./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/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_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/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_25861975-37c2-4fc3-8202-169938168bdd/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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- 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 07:20:19,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:20:19,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:20:19,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:20:19,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:20:19,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:20:19,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:20:19,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:20:19,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:20:19,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:20:19,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:20:19,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:20:19,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:20:19,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:20:19,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:20:19,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:20:19,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:20:19,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:20:19,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:20:19,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:20:19,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:20:19,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:20:19,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:20:19,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:20:19,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:20:19,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:20:19,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:20:19,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:20:19,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:20:19,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:20:19,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:20:19,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:20:19,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:20:19,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:20:19,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:20:19,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:20:19,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:20:19,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:20:19,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:20:19,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:20:19,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:20:19,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:20:19,272 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:20:19,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:20:19,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:20:19,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:20:19,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:20:19,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:20:19,274 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:20:19,274 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:20:19,275 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:20:19,275 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:20:19,276 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:20:19,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:20:19,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:20:19,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:20:19,277 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:20:19,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:20:19,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:20:19,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:20:19,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:20:19,280 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:20:19,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:20:19,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:20:19,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:20:19,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:20:19,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:20:19,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:20:19,283 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:20:19,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:20:19,283 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:20:19,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:20:19,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:20:19,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:20:19,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:20:19,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:20:19,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:20:19,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:20:19,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:20:19,285 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:20:19,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:20:19,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:20:19,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:20:19,287 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_25861975-37c2-4fc3-8202-169938168bdd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2022-11-19 07:20:19,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:20:19,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:20:19,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:20:19,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:20:19,628 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:20:19,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-19 07:20:19,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/data/4dfe93298/d05e37383b7549e987b7056b1c377916/FLAG1e06a5ce2 [2022-11-19 07:20:20,234 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:20:20,235 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-19 07:20:20,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/data/4dfe93298/d05e37383b7549e987b7056b1c377916/FLAG1e06a5ce2 [2022-11-19 07:20:20,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/data/4dfe93298/d05e37383b7549e987b7056b1c377916 [2022-11-19 07:20:20,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:20:20,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:20:20,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:20:20,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:20:20,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:20:20,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:20:20" (1/1) ... [2022-11-19 07:20:20,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bdb4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:20, skipping insertion in model container [2022-11-19 07:20:20,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:20:20" (1/1) ... [2022-11-19 07:20:20,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:20:20,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:20:20,926 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_25861975-37c2-4fc3-8202-169938168bdd/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-19 07:20:20,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:20:20,973 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:20:20,987 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_25861975-37c2-4fc3-8202-169938168bdd/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-19 07:20:21,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:20:21,016 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:20:21,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21 WrapperNode [2022-11-19 07:20:21,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:20:21,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:20:21,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:20:21,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:20:21,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,059 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2022-11-19 07:20:21,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:20:21,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:20:21,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:20:21,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:20:21,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,088 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:20:21,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:20:21,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:20:21,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:20:21,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (1/1) ... [2022-11-19 07:20:21,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:20:21,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:21,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:20:21,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:20:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:20:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:20:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:20:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:20:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:20:21,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:20:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:20:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:20:21,279 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:20:21,280 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:20:21,620 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:20:21,720 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:20:21,720 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:20:21,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:20:21 BoogieIcfgContainer [2022-11-19 07:20:21,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:20:21,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:20:21,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:20:21,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:20:21,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:20:20" (1/3) ... [2022-11-19 07:20:21,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8680cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:20:21, skipping insertion in model container [2022-11-19 07:20:21,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:20:21" (2/3) ... [2022-11-19 07:20:21,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8680cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:20:21, skipping insertion in model container [2022-11-19 07:20:21,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:20:21" (3/3) ... [2022-11-19 07:20:21,735 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-11-19 07:20:21,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:20:21,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:20:21,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:20:21,824 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;@f61b626, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:20:21,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:20:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 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 07:20:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:20:21,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:21,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:21,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1379774409, now seen corresponding path program 1 times [2022-11-19 07:20:21,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:21,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184673773] [2022-11-19 07:20:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:22,275 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 07:20:22,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:22,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184673773] [2022-11-19 07:20:22,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184673773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:22,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:22,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:20:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793266656] [2022-11-19 07:20:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:22,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:22,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:22,319 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 07:20:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:22,419 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2022-11-19 07:20:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:22,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-11-19 07:20:22,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:22,432 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:20:22,432 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:20:22,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:22,441 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:22,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:20:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:20:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 07:20:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 07:20:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2022-11-19 07:20:22,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2022-11-19 07:20:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:22,474 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-11-19 07:20:22,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 07:20:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2022-11-19 07:20:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:20:22,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:22,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:22,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:20:22,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:22,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1484939476, now seen corresponding path program 1 times [2022-11-19 07:20:22,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:22,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960306708] [2022-11-19 07:20:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:22,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:22,601 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 07:20:22,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960306708] [2022-11-19 07:20:22,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960306708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:22,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:22,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:20:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941519299] [2022-11-19 07:20:22,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:20:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:20:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:20:22,606 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 07:20:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:22,663 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-19 07:20:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:20:22,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-11-19 07:20:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:22,665 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:20:22,665 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 07:20:22,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 07:20:22,668 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:22,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:20:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 07:20:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-11-19 07:20:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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 07:20:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-11-19 07:20:22,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2022-11-19 07:20:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:22,676 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-11-19 07:20:22,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 07:20:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-11-19 07:20:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:20:22,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:22,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:22,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:20:22,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1350556832, now seen corresponding path program 1 times [2022-11-19 07:20:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:22,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687698683] [2022-11-19 07:20:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:20:22,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:22,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687698683] [2022-11-19 07:20:22,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687698683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:22,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:22,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:20:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527558864] [2022-11-19 07:20:22,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:22,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:22,792 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. 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 07:20:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:22,836 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-19 07:20:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:22,837 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 07:20:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:22,838 INFO L225 Difference]: With dead ends: 27 [2022-11-19 07:20:22,838 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 07:20:22,839 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 07:20:22,840 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:22,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:20:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 07:20:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-19 07:20:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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 07:20:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-19 07:20:22,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2022-11-19 07:20:22,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:22,849 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-19 07:20:22,850 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 07:20:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-19 07:20:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:20:22,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:22,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:20:22,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash 141282585, now seen corresponding path program 1 times [2022-11-19 07:20:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:22,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586646297] [2022-11-19 07:20:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:22,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:20:23,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586646297] [2022-11-19 07:20:23,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586646297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121915818] [2022-11-19 07:20:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:23,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:23,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:23,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:20:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:23,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:20:23,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:20:23,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:20:23,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121915818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:23,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593032918] [2022-11-19 07:20:23,523 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 07:20:23,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:23,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:23,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:23,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:23,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:23,843 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:20:23,844 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:20:23,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:23,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:23,983 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:23,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:24,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:20:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:24,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:24,383 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:20:24,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:20:24,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:24,566 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:24,566 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:24,713 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:20:24,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 07:20:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:24,834 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:20:24,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-19 07:20:25,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:27,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1593032918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:27,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:27,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 12 [2022-11-19 07:20:27,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862445968] [2022-11-19 07:20:27,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:20:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:20:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:20:27,104 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 07:20:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:27,764 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-11-19 07:20:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:20:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-11-19 07:20:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:27,766 INFO L225 Difference]: With dead ends: 38 [2022-11-19 07:20:27,766 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 07:20:27,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:20:27,768 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:27,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:20:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 07:20:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-19 07:20:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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 07:20:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-11-19 07:20:27,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2022-11-19 07:20:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:27,779 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-19 07:20:27,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 07:20:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-11-19 07:20:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:20:27,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:27,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:27,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:27,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:27,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1119880071, now seen corresponding path program 1 times [2022-11-19 07:20:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907427720] [2022-11-19 07:20:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:27,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:20:28,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:28,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907427720] [2022-11-19 07:20:28,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907427720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740143491] [2022-11-19 07:20:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:28,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:28,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:20:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:28,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:20:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:20:28,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:20:28,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740143491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:28,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645002268] [2022-11-19 07:20:28,345 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:20:28,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:28,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:28,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:28,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:28,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,443 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:20:28,444 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:20:28,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,538 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:28,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:28,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:20:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:28,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:28,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:28,736 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:20:28,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:20:28,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:28,839 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:28,840 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:28,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:28,934 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:20:28,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 07:20:29,119 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:29,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:29,469 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:29,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:29,626 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:29,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:29,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:30,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:30,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:30,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:30,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-19 07:20:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529224659] [2022-11-19 07:20:30,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:20:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:20:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:20:30,910 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 07:20:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:31,165 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-11-19 07:20:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:20:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 19 [2022-11-19 07:20:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:31,167 INFO L225 Difference]: With dead ends: 84 [2022-11-19 07:20:31,167 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 07:20:31,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:20:31,168 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:31,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 37 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:20:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 07:20:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2022-11-19 07:20:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-19 07:20:31,180 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2022-11-19 07:20:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:31,180 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-19 07:20:31,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 07:20:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-19 07:20:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:20:31,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:31,182 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:31,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:20:31,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:31,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1902894455, now seen corresponding path program 2 times [2022-11-19 07:20:31,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:31,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190930642] [2022-11-19 07:20:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:31,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:20:31,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190930642] [2022-11-19 07:20:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190930642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710701055] [2022-11-19 07:20:31,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:20:31,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:31,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:31,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:20:31,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:20:31,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:20:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:20:31,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:31,932 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:20:31,932 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 07:20:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:20:31,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710701055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015848590] [2022-11-19 07:20:31,955 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:20:31,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:31,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:31,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:31,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:31,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:31,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,025 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:20:32,026 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:20:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,114 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:32,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:32,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:20:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:32,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:32,315 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:20:32,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:20:32,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:32,402 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:32,402 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:32,467 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:20:32,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 07:20:32,608 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:32,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:32,944 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:32,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:33,116 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:33,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:33,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:34,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '904#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:34,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:34,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:34,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-19 07:20:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355037166] [2022-11-19 07:20:34,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:20:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:20:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:20:34,609 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:20:35,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:35,052 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-11-19 07:20:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:20:35,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 23 [2022-11-19 07:20:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:35,058 INFO L225 Difference]: With dead ends: 71 [2022-11-19 07:20:35,058 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 07:20:35,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:20:35,060 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:35,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 57 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:20:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 07:20:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-19 07:20:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 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 07:20:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-11-19 07:20:35,073 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2022-11-19 07:20:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:35,073 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-11-19 07:20:35,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:20:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-11-19 07:20:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:20:35,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:35,074 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:35,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:35,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:20:35,280 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash -346550703, now seen corresponding path program 1 times [2022-11-19 07:20:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:35,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810024429] [2022-11-19 07:20:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:20:35,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:35,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810024429] [2022-11-19 07:20:35,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810024429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:35,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060075314] [2022-11-19 07:20:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:35,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:35,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:35,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:20:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:35,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:20:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:20:35,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:20:35,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060075314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294195719] [2022-11-19 07:20:35,781 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:20:35,782 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:35,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:35,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:35,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:35,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:35,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:35,873 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:35,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:35,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:35,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:20:35,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:35,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:35,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:20:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:36,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:36,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:36,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:36,082 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:20:36,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:20:36,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:36,408 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:36,409 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:36,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:20:36,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-19 07:20:36,617 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:36,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:36,913 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:36,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:37,036 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:37,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:37,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:37,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-19 07:20:37,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:37,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:38,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1279#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:38,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:38,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:38,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-19 07:20:38,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346630432] [2022-11-19 07:20:38,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:38,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:20:38,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:20:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:20:38,308 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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 07:20:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:38,441 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2022-11-19 07:20:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:20:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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 25 [2022-11-19 07:20:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:38,442 INFO L225 Difference]: With dead ends: 71 [2022-11-19 07:20:38,442 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 07:20:38,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:20:38,444 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:38,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:20:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 07:20:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-11-19 07:20:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-19 07:20:38,458 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 25 [2022-11-19 07:20:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:38,458 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-19 07:20:38,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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 07:20:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-19 07:20:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:20:38,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:38,460 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:38,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:38,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:38,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash -85398682, now seen corresponding path program 2 times [2022-11-19 07:20:38,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:38,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547775809] [2022-11-19 07:20:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:38,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:20:39,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547775809] [2022-11-19 07:20:39,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547775809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51437094] [2022-11-19 07:20:39,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:20:39,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:39,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:39,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:39,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:20:39,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:20:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:39,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:20:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:39,261 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 38 treesize of output 22 [2022-11-19 07:20:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-19 07:20:39,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:39,465 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 42 treesize of output 26 [2022-11-19 07:20:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-19 07:20:39,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51437094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:39,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355941024] [2022-11-19 07:20:39,557 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:20:39,557 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:39,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:39,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:39,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,637 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:39,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:39,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:20:39,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:20:39,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:39,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:39,817 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:20:39,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:20:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:39,910 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:39,910 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:39,979 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:20:39,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 07:20:40,122 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:40,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:40,374 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:40,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:40,504 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:40,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:40,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:40,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-19 07:20:40,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:40,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:42,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1698#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:42,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:42,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:42,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 26 [2022-11-19 07:20:42,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089804467] [2022-11-19 07:20:42,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:42,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:20:42,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:20:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:20:42,046 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 07:20:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:44,360 INFO L93 Difference]: Finished difference Result 387 states and 461 transitions. [2022-11-19 07:20:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-19 07:20:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 32 [2022-11-19 07:20:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:44,365 INFO L225 Difference]: With dead ends: 387 [2022-11-19 07:20:44,365 INFO L226 Difference]: Without dead ends: 359 [2022-11-19 07:20:44,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3042, Invalid=8300, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 07:20:44,370 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 971 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:44,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 143 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:20:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-19 07:20:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 73. [2022-11-19 07:20:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 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 07:20:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2022-11-19 07:20:44,400 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 32 [2022-11-19 07:20:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:44,400 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2022-11-19 07:20:44,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 07:20:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2022-11-19 07:20:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:20:44,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:44,402 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:44,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:44,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1069550116, now seen corresponding path program 3 times [2022-11-19 07:20:44,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:44,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620329771] [2022-11-19 07:20:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:20:45,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620329771] [2022-11-19 07:20:45,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620329771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426691390] [2022-11-19 07:20:45,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:20:45,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:45,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:45,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:45,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:20:45,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:20:45,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:20:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:45,637 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-19 07:20:45,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-11-19 07:20:45,797 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-19 07:20:45,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 71 [2022-11-19 07:20:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-19 07:20:45,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:46,329 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 63 treesize of output 55 [2022-11-19 07:20:46,355 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-19 07:20:46,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 396 treesize of output 301 [2022-11-19 07:20:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-19 07:20:46,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426691390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:46,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411174921] [2022-11-19 07:20:46,434 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:20:46,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:46,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:46,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:46,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,516 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:46,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:46,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:20:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:20:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:46,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:46,711 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:20:46,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:20:46,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:46,795 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:46,796 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:46,858 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:20:46,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 07:20:47,037 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:47,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:47,326 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:47,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:47,441 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:47,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:47,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:47,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-19 07:20:47,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:47,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:49,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2785#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:49,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:49,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:49,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 35 [2022-11-19 07:20:49,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29305719] [2022-11-19 07:20:49,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:49,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:20:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:20:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:20:49,055 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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 07:20:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:49,695 INFO L93 Difference]: Finished difference Result 158 states and 207 transitions. [2022-11-19 07:20:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:20:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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 38 [2022-11-19 07:20:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:49,696 INFO L225 Difference]: With dead ends: 158 [2022-11-19 07:20:49,696 INFO L226 Difference]: Without dead ends: 103 [2022-11-19 07:20:49,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:20:49,698 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:49,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 113 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 283 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-11-19 07:20:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-19 07:20:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2022-11-19 07:20:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3125) internal successors, (105), 80 states have internal predecessors, (105), 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 07:20:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2022-11-19 07:20:49,725 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 38 [2022-11-19 07:20:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:49,725 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2022-11-19 07:20:49,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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 07:20:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2022-11-19 07:20:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:20:49,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:49,727 INFO L195 NwaCegarLoop]: trace histogram [17, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:49,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:49,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:49,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash -828337945, now seen corresponding path program 4 times [2022-11-19 07:20:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:49,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839396927] [2022-11-19 07:20:49,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:49,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:20:50,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:50,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839396927] [2022-11-19 07:20:50,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839396927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:50,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821243904] [2022-11-19 07:20:50,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:20:50,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:50,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:50,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:20:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:20:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:20:51,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:20:51,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821243904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:51,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896897767] [2022-11-19 07:20:51,650 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:20:51,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:51,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:51,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:51,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:51,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,733 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:51,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:20:51,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:20:51,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:51,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:51,892 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:20:51,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:20:51,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:51,986 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:51,987 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:52,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:52,046 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:20:52,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 07:20:52,169 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:52,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:52,433 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:52,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:52,555 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:52,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:52,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:52,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-19 07:20:52,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:52,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:54,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3532#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:54,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:54,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:54,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-11-19 07:20:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366226038] [2022-11-19 07:20:54,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:54,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 07:20:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 07:20:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1610, Invalid=2946, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:20:54,056 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:54,200 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2022-11-19 07:20:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:20:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-19 07:20:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:54,203 INFO L225 Difference]: With dead ends: 166 [2022-11-19 07:20:54,203 INFO L226 Difference]: Without dead ends: 104 [2022-11-19 07:20:54,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1610, Invalid=2946, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:20:54,206 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:54,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:20:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-19 07:20:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-11-19 07:20:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 99 states have internal predecessors, (124), 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 07:20:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-11-19 07:20:54,248 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 41 [2022-11-19 07:20:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:54,249 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-11-19 07:20:54,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-11-19 07:20:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:20:54,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:54,250 INFO L195 NwaCegarLoop]: trace histogram [36, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:54,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:54,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:20:54,455 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1543539772, now seen corresponding path program 5 times [2022-11-19 07:20:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:54,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392476328] [2022-11-19 07:20:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:20:56,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:56,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392476328] [2022-11-19 07:20:56,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392476328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:56,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168792922] [2022-11-19 07:20:56,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:20:56,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:56,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:56,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:56,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:20:56,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:20:56,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:20:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2022-11-19 07:20:56,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2022-11-19 07:20:56,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168792922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372647643] [2022-11-19 07:20:56,774 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:20:56,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:56,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:56,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:56,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,855 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:20:56,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:20:56,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:20:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:20:56,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:56,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:56,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:57,043 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:20:57,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:20:57,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:57,331 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:20:57,332 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:20:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:20:57,519 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:20:57,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:20:57,786 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:57,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:57,911 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:20:57,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:20:58,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:58,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:20:58,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:59,753 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4435#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:59,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:59,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:59,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 5, 5] total 46 [2022-11-19 07:20:59,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788025212] [2022-11-19 07:20:59,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 07:20:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 07:20:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2462, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 07:20:59,757 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 46 states have internal predecessors, (75), 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 07:21:01,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:01,525 INFO L93 Difference]: Finished difference Result 431 states and 516 transitions. [2022-11-19 07:21:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-19 07:21:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 46 states have internal predecessors, (75), 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 07:21:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:01,527 INFO L225 Difference]: With dead ends: 431 [2022-11-19 07:21:01,528 INFO L226 Difference]: Without dead ends: 369 [2022-11-19 07:21:01,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2574, Invalid=6932, Unknown=0, NotChecked=0, Total=9506 [2022-11-19 07:21:01,531 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1177 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:01,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 153 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:21:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-19 07:21:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 129. [2022-11-19 07:21:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.2890625) internal successors, (165), 128 states have internal predecessors, (165), 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 07:21:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2022-11-19 07:21:01,588 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 60 [2022-11-19 07:21:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:01,588 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2022-11-19 07:21:01,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 46 states have internal predecessors, (75), 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 07:21:01,589 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2022-11-19 07:21:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:21:01,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:01,594 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:01,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:01,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:21:01,811 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash 174845735, now seen corresponding path program 6 times [2022-11-19 07:21:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:01,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536254989] [2022-11-19 07:21:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:01,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:21:03,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:03,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536254989] [2022-11-19 07:21:03,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536254989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:21:03,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125918941] [2022-11-19 07:21:03,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:21:03,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:03,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:03,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:03,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:21:03,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:21:03,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:21:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:21:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:04,297 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-19 07:21:04,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-11-19 07:21:04,420 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-19 07:21:04,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 66 [2022-11-19 07:21:04,612 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-19 07:21:04,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 82 [2022-11-19 07:21:04,848 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-19 07:21:04,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 82 [2022-11-19 07:21:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-19 07:21:05,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:20,716 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 91 treesize of output 83 [2022-11-19 07:21:20,748 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-19 07:21:20,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 6404 treesize of output 4725 [2022-11-19 07:21:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-19 07:21:21,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125918941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:21,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220179702] [2022-11-19 07:21:21,752 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:21:21,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:21:21,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:21:21,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:21:21,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,830 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:21:21,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:21:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:21:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:21:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:21,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:21,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:21,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,020 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:21:22,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:21:22,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,274 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:21:22,275 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:21:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:22,465 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:21:22,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:21:22,890 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:21:22,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:21:23,140 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:21:23,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:21:23,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:21:23,351 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-19 07:21:23,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-19 07:21:23,400 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-19 07:21:23,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:21:23,526 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:21:25,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5908#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:21:25,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:21:25,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:21:25,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13, 13] total 60 [2022-11-19 07:21:25,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527139030] [2022-11-19 07:21:25,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:25,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-19 07:21:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-19 07:21:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=4034, Unknown=9, NotChecked=0, Total=5112 [2022-11-19 07:21:25,165 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 60 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 60 states have internal predecessors, (88), 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 07:21:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:33,889 INFO L93 Difference]: Finished difference Result 247 states and 324 transitions. [2022-11-19 07:21:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 07:21:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 60 states have internal predecessors, (88), 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 73 [2022-11-19 07:21:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:33,891 INFO L225 Difference]: With dead ends: 247 [2022-11-19 07:21:33,891 INFO L226 Difference]: Without dead ends: 157 [2022-11-19 07:21:33,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=1170, Invalid=5137, Unknown=13, NotChecked=0, Total=6320 [2022-11-19 07:21:33,894 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:33,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 97 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 356 Invalid, 0 Unknown, 213 Unchecked, 0.3s Time] [2022-11-19 07:21:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-19 07:21:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2022-11-19 07:21:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2936507936507937) internal successors, (163), 126 states have internal predecessors, (163), 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 07:21:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-11-19 07:21:33,929 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 73 [2022-11-19 07:21:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:33,929 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-11-19 07:21:33,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 60 states have internal predecessors, (88), 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 07:21:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-11-19 07:21:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:21:33,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:33,930 INFO L195 NwaCegarLoop]: trace histogram [38, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:33,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 07:21:34,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:34,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1817032484, now seen corresponding path program 7 times [2022-11-19 07:21:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:34,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660483895] [2022-11-19 07:21:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:34,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 07:21:35,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:35,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660483895] [2022-11-19 07:21:35,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660483895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:21:35,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107841387] [2022-11-19 07:21:35,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:21:35,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:35,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:36,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:21:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:21:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 07:21:37,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 07:21:39,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107841387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:39,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657522866] [2022-11-19 07:21:39,726 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:21:39,727 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:21:39,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:21:39,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:21:39,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,803 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:21:39,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:21:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:21:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:21:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:39,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:39,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:39,986 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:21:39,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:21:40,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:40,063 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:21:40,064 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:21:40,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:40,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:40,272 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:21:40,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:21:40,562 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:21:40,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:21:40,693 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:21:40,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:21:40,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:21:40,861 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-19 07:21:40,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-19 07:21:40,910 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-19 07:21:40,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:21:40,988 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:21:42,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7172#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:21:42,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:21:42,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:21:42,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2022-11-19 07:21:42,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151854314] [2022-11-19 07:21:42,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-19 07:21:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:42,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-19 07:21:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6713, Invalid=10317, Unknown=0, NotChecked=0, Total=17030 [2022-11-19 07:21:42,217 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 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 07:21:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:42,563 INFO L93 Difference]: Finished difference Result 257 states and 368 transitions. [2022-11-19 07:21:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-19 07:21:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 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 74 [2022-11-19 07:21:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:42,565 INFO L225 Difference]: With dead ends: 257 [2022-11-19 07:21:42,565 INFO L226 Difference]: Without dead ends: 170 [2022-11-19 07:21:42,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8429 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6713, Invalid=10317, Unknown=0, NotChecked=0, Total=17030 [2022-11-19 07:21:42,567 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:42,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:21:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-19 07:21:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-11-19 07:21:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.2228915662650603) internal successors, (203), 166 states have internal predecessors, (203), 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 07:21:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 203 transitions. [2022-11-19 07:21:42,609 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 203 transitions. Word has length 74 [2022-11-19 07:21:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:42,609 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 203 transitions. [2022-11-19 07:21:42,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 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 07:21:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 203 transitions. [2022-11-19 07:21:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:21:42,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:42,611 INFO L195 NwaCegarLoop]: trace histogram [78, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:42,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:42,813 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1399006300, now seen corresponding path program 8 times [2022-11-19 07:21:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:42,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640512256] [2022-11-19 07:21:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 07:21:49,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640512256] [2022-11-19 07:21:49,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640512256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:21:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414515290] [2022-11-19 07:21:49,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:21:49,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:49,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:49,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:21:49,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:21:49,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:21:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:21:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:50,190 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:21:50,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-11-19 07:21:50,287 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:21:50,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2022-11-19 07:21:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3138 trivial. 0 not checked. [2022-11-19 07:21:50,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:55,919 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 29 treesize of output 25 [2022-11-19 07:21:55,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:21:55,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 132 [2022-11-19 07:21:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 3138 trivial. 0 not checked. [2022-11-19 07:21:56,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414515290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [141532053] [2022-11-19 07:21:56,518 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:21:56,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:21:56,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:21:56,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:21:56,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,613 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:21:56,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:21:56,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:21:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:21:56,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:56,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:56,786 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:21:56,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:21:56,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:56,860 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:21:56,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:21:57,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:57,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:57,040 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:21:57,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:21:57,301 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:21:57,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:21:57,409 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:21:57,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:21:57,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:21:57,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-19 07:21:57,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:21:57,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:21:59,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8758#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:21:59,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:21:59,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:21:59,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 10, 10] total 98 [2022-11-19 07:21:59,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807464647] [2022-11-19 07:21:59,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:59,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-19 07:21:59,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-19 07:21:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3875, Invalid=8332, Unknown=3, NotChecked=0, Total=12210 [2022-11-19 07:21:59,512 INFO L87 Difference]: Start difference. First operand 167 states and 203 transitions. Second operand has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 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 07:22:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:28,644 INFO L93 Difference]: Finished difference Result 820 states and 963 transitions. [2022-11-19 07:22:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 336 states. [2022-11-19 07:22:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 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 114 [2022-11-19 07:22:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:28,653 INFO L225 Difference]: With dead ends: 820 [2022-11-19 07:22:28,653 INFO L226 Difference]: Without dead ends: 733 [2022-11-19 07:22:28,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62604 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=39601, Invalid=150054, Unknown=5, NotChecked=0, Total=189660 [2022-11-19 07:22:28,666 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2678 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 1150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1150 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:28,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2678 Valid, 311 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1150 Valid, 696 Invalid, 0 Unknown, 211 Unchecked, 1.4s Time] [2022-11-19 07:22:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-19 07:22:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 173. [2022-11-19 07:22:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2325581395348837) internal successors, (212), 172 states have internal predecessors, (212), 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 07:22:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 212 transitions. [2022-11-19 07:22:28,733 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 212 transitions. Word has length 114 [2022-11-19 07:22:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:28,733 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 212 transitions. [2022-11-19 07:22:28,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 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 07:22:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 212 transitions. [2022-11-19 07:22:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:22:28,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:28,735 INFO L195 NwaCegarLoop]: trace histogram [79, 6, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:28,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:22:28,935 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:28,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1276174571, now seen corresponding path program 1 times [2022-11-19 07:22:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241591240] [2022-11-19 07:22:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:22:34,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:34,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241591240] [2022-11-19 07:22:34,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241591240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:22:34,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229495992] [2022-11-19 07:22:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:34,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:34,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:34,760 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:34,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:22:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-19 07:22:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:22:39,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:22:48,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229495992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505533101] [2022-11-19 07:22:48,127 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:22:48,127 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:22:48,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:22:48,127 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:22:48,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:22:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,202 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:22:48,202 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:22:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,290 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:22:48,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:22:48,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:22:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:22:48,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:22:48,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:22:48,460 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:22:48,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:22:48,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:22:48,793 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:22:48,793 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:22:48,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:22:48,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:22:49,009 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:22:49,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:22:49,449 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:22:49,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:22:49,652 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:22:49,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:22:49,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:22:49,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-19 07:22:49,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:22:50,063 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:22:52,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11959#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:22:52,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:22:52,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:22:52,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 241 [2022-11-19 07:22:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269588524] [2022-11-19 07:22:52,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:22:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2022-11-19 07:22:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:52,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2022-11-19 07:22:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26129, Invalid=38641, Unknown=0, NotChecked=0, Total=64770 [2022-11-19 07:22:52,133 INFO L87 Difference]: Start difference. First operand 173 states and 212 transitions. Second operand has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 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 07:22:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:52,699 INFO L93 Difference]: Finished difference Result 348 states and 506 transitions. [2022-11-19 07:22:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-19 07:22:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 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 116 [2022-11-19 07:22:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:52,701 INFO L225 Difference]: With dead ends: 348 [2022-11-19 07:22:52,701 INFO L226 Difference]: Without dead ends: 256 [2022-11-19 07:22:52,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30564 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=26129, Invalid=38641, Unknown=0, NotChecked=0, Total=64770 [2022-11-19 07:22:52,706 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:52,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:22:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-19 07:22:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 254. [2022-11-19 07:22:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.158102766798419) internal successors, (293), 253 states have internal predecessors, (293), 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 07:22:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 293 transitions. [2022-11-19 07:22:52,777 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 293 transitions. Word has length 116 [2022-11-19 07:22:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:52,777 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 293 transitions. [2022-11-19 07:22:52,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 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 07:22:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 293 transitions. [2022-11-19 07:22:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-19 07:22:52,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:52,780 INFO L195 NwaCegarLoop]: trace histogram [160, 6, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:52,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:52,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:52,987 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1710327296, now seen corresponding path program 2 times [2022-11-19 07:22:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:52,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168997835] [2022-11-19 07:22:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12942 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:23:13,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168997835] [2022-11-19 07:23:13,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168997835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:23:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18937494] [2022-11-19 07:23:13,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:23:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:13,107 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:13,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:23:13,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:23:13,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:23:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:23:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:14,627 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 07:23:14,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2022-11-19 07:23:14,769 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 07:23:14,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 35 [2022-11-19 07:23:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12942 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 12931 trivial. 0 not checked. [2022-11-19 07:23:15,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:27,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-19 07:23:27,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:23:27,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 132 [2022-11-19 07:23:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12942 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 12931 trivial. 0 not checked. [2022-11-19 07:23:28,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18937494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:28,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577573049] [2022-11-19 07:23:28,861 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:23:28,862 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:23:28,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:23:28,862 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:23:28,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:23:28,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:28,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:28,932 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:23:28,932 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:23:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:29,019 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:23:29,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:23:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:29,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:23:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:29,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:29,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:29,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:29,276 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:23:29,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:23:29,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:29,601 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:23:29,601 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:23:29,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:29,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:23:29,796 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:23:29,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:23:30,253 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:23:30,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:23:30,432 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:23:30,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:23:30,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:23:30,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:23:30,784 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:23:34,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14488#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:23:34,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:23:34,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:23:34,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 13, 13] total 186 [2022-11-19 07:23:34,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71453411] [2022-11-19 07:23:34,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:23:34,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 187 states [2022-11-19 07:23:34,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2022-11-19 07:23:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14054, Invalid=25742, Unknown=4, NotChecked=0, Total=39800 [2022-11-19 07:23:34,596 INFO L87 Difference]: Start difference. First operand 254 states and 293 transitions. Second operand has 187 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 186 states have internal predecessors, (225), 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 07:27:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:39,064 INFO L93 Difference]: Finished difference Result 2265 states and 2492 transitions. [2022-11-19 07:27:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1140 states. [2022-11-19 07:27:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 187 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 186 states have internal predecessors, (225), 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 197 [2022-11-19 07:27:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:39,072 INFO L225 Difference]: With dead ends: 2265 [2022-11-19 07:27:39,072 INFO L226 Difference]: Without dead ends: 2173 [2022-11-19 07:27:39,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2042 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 1329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706270 ImplicationChecksByTransitivity, 236.0s TimeCoverageRelationStatistics Valid=406494, Invalid=1363732, Unknown=4, NotChecked=0, Total=1770230 [2022-11-19 07:27:39,165 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17847 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 4198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17847 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 5552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4198 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:39,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17847 Valid, 580 Invalid, 5552 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4198 Valid, 1099 Invalid, 0 Unknown, 255 Unchecked, 4.2s Time] [2022-11-19 07:27:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2022-11-19 07:27:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 261. [2022-11-19 07:27:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.1615384615384616) internal successors, (302), 260 states have internal predecessors, (302), 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 07:27:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 302 transitions. [2022-11-19 07:27:39,263 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 302 transitions. Word has length 197 [2022-11-19 07:27:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:39,264 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 302 transitions. [2022-11-19 07:27:39,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 187 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 186 states have internal predecessors, (225), 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 07:27:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 302 transitions. [2022-11-19 07:27:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-19 07:27:39,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:39,267 INFO L195 NwaCegarLoop]: trace histogram [161, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:39,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 07:27:39,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:27:39,473 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1616680583, now seen corresponding path program 9 times [2022-11-19 07:27:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:39,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919010538] [2022-11-19 07:27:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13117 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-19 07:28:00,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919010538] [2022-11-19 07:28:00,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919010538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329759164] [2022-11-19 07:28:00,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:28:00,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:00,855 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:00,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:28:01,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:28:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:28:01,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:02,931 INFO L321 Elim1Store]: treesize reduction 64, result has 53.6 percent of original size [2022-11-19 07:28:02,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 115 [2022-11-19 07:28:03,368 INFO L321 Elim1Store]: treesize reduction 64, result has 53.6 percent of original size [2022-11-19 07:28:03,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 122 [2022-11-19 07:28:04,501 INFO L321 Elim1Store]: treesize reduction 64, result has 53.6 percent of original size [2022-11-19 07:28:04,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 130 [2022-11-19 07:28:07,574 INFO L321 Elim1Store]: treesize reduction 94, result has 55.5 percent of original size [2022-11-19 07:28:07,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 185 [2022-11-19 07:28:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13117 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 13092 trivial. 0 not checked. [2022-11-19 07:28:09,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:32,661 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 64 treesize of output 56 [2022-11-19 07:28:32,687 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-11-19 07:28:32,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 774 treesize of output 581 [2022-11-19 07:28:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13117 backedges. 3 proven. 19 refuted. 3 times theorem prover too weak. 13092 trivial. 0 not checked. [2022-11-19 07:28:32,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329759164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:32,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925180832] [2022-11-19 07:28:32,870 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:28:32,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:32,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:32,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:32,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:32,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:32,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:32,965 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:28:32,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:28:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:32,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:32,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:28:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:33,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:28:33,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:33,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:33,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:33,305 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:28:33,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:28:33,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:33,576 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:28:33,577 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:28:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:33,773 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:28:33,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:28:34,196 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:28:34,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:28:34,387 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:28:34,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:28:34,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:28:34,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:28:34,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:38,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21852#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:28:38,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:38,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:38,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 15, 15] total 188 [2022-11-19 07:28:38,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090462670] [2022-11-19 07:28:38,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-11-19 07:28:38,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-11-19 07:28:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14064, Invalid=25724, Unknown=12, NotChecked=0, Total=39800 [2022-11-19 07:28:38,248 INFO L87 Difference]: Start difference. First operand 261 states and 302 transitions. Second operand has 188 states, 188 states have (on average 1.148936170212766) internal successors, (216), 188 states have internal predecessors, (216), 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 07:28:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:41,062 INFO L93 Difference]: Finished difference Result 380 states and 464 transitions. [2022-11-19 07:28:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-11-19 07:28:41,063 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.148936170212766) internal successors, (216), 188 states have internal predecessors, (216), 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 199 [2022-11-19 07:28:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:41,065 INFO L225 Difference]: With dead ends: 380 [2022-11-19 07:28:41,065 INFO L226 Difference]: Without dead ends: 282 [2022-11-19 07:28:41,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 560 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=14338, Invalid=29540, Unknown=12, NotChecked=0, Total=43890 [2022-11-19 07:28:41,069 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:41,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 132 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 418 Invalid, 0 Unknown, 430 Unchecked, 0.3s Time] [2022-11-19 07:28:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-19 07:28:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 257. [2022-11-19 07:28:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.15625) internal successors, (296), 256 states have internal predecessors, (296), 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 07:28:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 296 transitions. [2022-11-19 07:28:41,162 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 296 transitions. Word has length 199 [2022-11-19 07:28:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:41,162 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 296 transitions. [2022-11-19 07:28:41,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.148936170212766) internal successors, (216), 188 states have internal predecessors, (216), 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 07:28:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 296 transitions. [2022-11-19 07:28:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-19 07:28:41,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:41,165 INFO L195 NwaCegarLoop]: trace histogram [162, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:41,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:41,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:28:41,377 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 635016192, now seen corresponding path program 3 times [2022-11-19 07:28:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:41,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391456210] [2022-11-19 07:28:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:41,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13272 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 07:29:01,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391456210] [2022-11-19 07:29:01,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391456210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071595453] [2022-11-19 07:29:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:01,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:01,259 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:01,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:29:02,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:02,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-19 07:29:02,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:02,692 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-19 07:29:02,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 66 [2022-11-19 07:29:02,943 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-19 07:29:02,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 73 [2022-11-19 07:29:03,267 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-19 07:29:03,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 81 [2022-11-19 07:29:03,612 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-19 07:29:03,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 81 [2022-11-19 07:29:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13272 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 13254 trivial. 0 not checked. [2022-11-19 07:29:04,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:20,336 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 69 treesize of output 61 [2022-11-19 07:29:20,365 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-19 07:29:20,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1619 treesize of output 1157 [2022-11-19 07:29:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13272 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 13254 trivial. 0 not checked. [2022-11-19 07:29:20,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071595453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780407020] [2022-11-19 07:29:20,561 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:29:20,561 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:20,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:20,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:20,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,642 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:29:20,642 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:29:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,739 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:29:20,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:29:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:29:20,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:20,882 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:29:20,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-19 07:29:20,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:20,960 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:29:20,960 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:29:21,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:21,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:21,125 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:29:21,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:29:21,402 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:29:21,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:29:21,515 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:29:21,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:29:21,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:29:21,690 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-19 07:29:21,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-19 07:29:21,730 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-19 07:29:21,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:29:21,968 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:25,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24475#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:29:25,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:25,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:25,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 14, 14] total 186 [2022-11-19 07:29:25,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347665888] [2022-11-19 07:29:25,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:25,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-11-19 07:29:25,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-11-19 07:29:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13708, Invalid=25686, Unknown=8, NotChecked=0, Total=39402 [2022-11-19 07:29:25,890 INFO L87 Difference]: Start difference. First operand 257 states and 296 transitions. Second operand has 186 states, 186 states have (on average 1.1827956989247312) internal successors, (220), 186 states have internal predecessors, (220), 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 07:29:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:27,972 INFO L93 Difference]: Finished difference Result 392 states and 474 transitions. [2022-11-19 07:29:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-11-19 07:29:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.1827956989247312) internal successors, (220), 186 states have internal predecessors, (220), 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 201 [2022-11-19 07:29:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:27,975 INFO L225 Difference]: With dead ends: 392 [2022-11-19 07:29:27,975 INFO L226 Difference]: Without dead ends: 299 [2022-11-19 07:29:27,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 567 SyntacticMatches, 1 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6244 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=14102, Invalid=29362, Unknown=8, NotChecked=0, Total=43472 [2022-11-19 07:29:27,979 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:27,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 184 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 683 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-11-19 07:29:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-19 07:29:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 262. [2022-11-19 07:29:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.157088122605364) internal successors, (302), 261 states have internal predecessors, (302), 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 07:29:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 302 transitions. [2022-11-19 07:29:28,116 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 302 transitions. Word has length 201 [2022-11-19 07:29:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:28,117 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 302 transitions. [2022-11-19 07:29:28,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.1827956989247312) internal successors, (220), 186 states have internal predecessors, (220), 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 07:29:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 302 transitions. [2022-11-19 07:29:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-19 07:29:28,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:28,119 INFO L195 NwaCegarLoop]: trace histogram [163, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:28,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:28,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:29:28,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 82687975, now seen corresponding path program 4 times [2022-11-19 07:29:28,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:28,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750832668] [2022-11-19 07:29:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:28,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13433 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:29:48,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750832668] [2022-11-19 07:29:48,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750832668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:48,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019979359] [2022-11-19 07:29:48,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:29:48,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:48,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:48,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:48,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:29:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 166 conjunts are in the unsatisfiable core [2022-11-19 07:29:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13433 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:30:04,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13433 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:30:45,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019979359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:45,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185835924] [2022-11-19 07:30:45,177 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:30:45,177 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:45,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:45,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:45,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:45,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,263 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:30:45,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:30:45,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:30:45,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:30:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:45,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:45,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:45,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:45,442 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:30:45,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:30:45,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:45,708 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:30:45,708 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:30:45,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:45,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:45,878 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:30:45,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:30:46,357 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:30:46,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:30:46,588 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:30:46,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:30:46,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:30:46,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-19 07:30:46,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:30:47,026 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:50,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27439#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:30:50,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:50,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:50,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165, 165] total 493 [2022-11-19 07:30:50,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207543648] [2022-11-19 07:30:50,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:50,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 494 states [2022-11-19 07:30:50,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 494 interpolants. [2022-11-19 07:30:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108617, Invalid=147925, Unknown=0, NotChecked=0, Total=256542 [2022-11-19 07:30:50,690 INFO L87 Difference]: Start difference. First operand 262 states and 302 transitions. Second operand has 494 states, 494 states have (on average 1.0364372469635628) internal successors, (512), 493 states have internal predecessors, (512), 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 07:30:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:53,544 INFO L93 Difference]: Finished difference Result 527 states and 771 transitions. [2022-11-19 07:30:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2022-11-19 07:30:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 494 states, 494 states have (on average 1.0364372469635628) internal successors, (512), 493 states have internal predecessors, (512), 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 203 [2022-11-19 07:30:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:53,547 INFO L225 Difference]: With dead ends: 527 [2022-11-19 07:30:53,547 INFO L226 Difference]: Without dead ends: 430 [2022-11-19 07:30:53,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117756 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=108617, Invalid=147925, Unknown=0, NotChecked=0, Total=256542 [2022-11-19 07:30:53,558 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:53,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:30:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-19 07:30:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 427. [2022-11-19 07:30:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.096244131455399) internal successors, (467), 426 states have internal predecessors, (467), 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 07:30:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 467 transitions. [2022-11-19 07:30:53,712 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 467 transitions. Word has length 203 [2022-11-19 07:30:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:53,713 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 467 transitions. [2022-11-19 07:30:53,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 494 states, 494 states have (on average 1.0364372469635628) internal successors, (512), 493 states have internal predecessors, (512), 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 07:30:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 467 transitions. [2022-11-19 07:30:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-11-19 07:30:53,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:53,717 INFO L195 NwaCegarLoop]: trace histogram [328, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:53,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:53,933 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1458107996, now seen corresponding path program 5 times [2022-11-19 07:30:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573265377] [2022-11-19 07:30:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 54023 backedges. 0 proven. 53956 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:32:23,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573265377] [2022-11-19 07:32:23,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573265377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905115018] [2022-11-19 07:32:23,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:32:23,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:23,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:23,537 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:23,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25861975-37c2-4fc3-8202-169938168bdd/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:32:24,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:32:24,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:32:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:32:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:25,915 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 38 treesize of output 22 [2022-11-19 07:32:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 54023 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54014 trivial. 0 not checked. [2022-11-19 07:32:26,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:27,757 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 42 treesize of output 26 [2022-11-19 07:32:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54023 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54014 trivial. 0 not checked. [2022-11-19 07:32:29,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905115018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:32:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694310060] [2022-11-19 07:32:29,267 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:32:29,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:32:29,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:32:29,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:32:29,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:32:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,344 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:32:29,344 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:32:29,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,430 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:32:29,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:32:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:32:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:29,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:29,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:29,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:29,605 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:32:29,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-19 07:32:29,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:29,861 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:32:29,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:32:30,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:30,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:30,035 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-19 07:32:30,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-19 07:32:30,459 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:32:30,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:32:30,648 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:32:30,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-19 07:32:30,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:32:30,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 07:32:31,020 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:37,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31849#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:32:37,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:32:37,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:37,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [330, 9, 9] total 346 [2022-11-19 07:32:37,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097984075] [2022-11-19 07:32:37,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 347 states [2022-11-19 07:32:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 347 interpolants. [2022-11-19 07:32:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58405, Invalid=70835, Unknown=0, NotChecked=0, Total=129240 [2022-11-19 07:32:37,999 INFO L87 Difference]: Start difference. First operand 427 states and 467 transitions. Second operand has 347 states, 347 states have (on average 1.0979827089337175) internal successors, (381), 346 states have internal predecessors, (381), 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)