./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9 --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 aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 --- 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-6b4ec56 [2022-11-20 20:22:17,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:22:17,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:22:17,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:22:17,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:22:17,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:22:17,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:22:17,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:22:17,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:22:17,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:22:17,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:22:17,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:22:17,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:22:17,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:22:17,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:22:17,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:22:17,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:22:17,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:22:17,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:22:17,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:22:17,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:22:17,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:22:17,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:22:17,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:22:17,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:22:17,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:22:17,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:22:17,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:22:17,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:22:17,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:22:17,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:22:17,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:22:17,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:22:17,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:22:17,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:22:17,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:22:17,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:22:17,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:22:17,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:22:17,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:22:17,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:22:17,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:22:17,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:22:17,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:22:17,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:22:17,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:22:17,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:22:17,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:22:17,536 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:22:17,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:22:17,536 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:22:17,536 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:22:17,538 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:22:17,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:22:17,538 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:22:17,538 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:22:17,538 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:22:17,539 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:22:17,539 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:22:17,539 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:22:17,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:22:17,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:22:17,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:22:17,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:22:17,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:22:17,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:22:17,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:22:17,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:22:17,543 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:22:17,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:22:17,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:22:17,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:22:17,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:22:17,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:22:17,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:22:17,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:22:17,545 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:22:17,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:22:17,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:22:17,545 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:22:17,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:22:17,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:22:17,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:22:17,546 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_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 [2022-11-20 20:22:17,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:22:17,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:22:17,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:22:17,892 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:22:17,893 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:22:17,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2022-11-20 20:22:21,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:22:21,269 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:22:21,270 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2022-11-20 20:22:21,279 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/data/c3fc51d62/9bc71a6b1508434686c6cb7c09f0b500/FLAG08ea51b58 [2022-11-20 20:22:21,293 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/data/c3fc51d62/9bc71a6b1508434686c6cb7c09f0b500 [2022-11-20 20:22:21,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:22:21,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:22:21,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:22:21,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:22:21,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:22:21,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d7567e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21, skipping insertion in model container [2022-11-20 20:22:21,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:22:21,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:22:21,470 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2022-11-20 20:22:21,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:22:21,502 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:22:21,512 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2022-11-20 20:22:21,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:22:21,552 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:22:21,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21 WrapperNode [2022-11-20 20:22:21,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:22:21,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:22:21,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:22:21,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:22:21,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,591 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 192 [2022-11-20 20:22:21,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:22:21,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:22:21,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:22:21,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:22:21,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,620 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:22:21,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:22:21,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:22:21,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:22:21,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (1/1) ... [2022-11-20 20:22:21,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:22:21,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:21,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:22:21,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:22:21,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:22:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:22:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:22:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:22:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:22:21,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:22:21,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:22:21,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:22:21,834 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:22:21,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:22:22,159 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:22:22,228 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:22:22,228 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-20 20:22:22,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:22:22 BoogieIcfgContainer [2022-11-20 20:22:22,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:22:22,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:22:22,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:22:22,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:22:22,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:22:21" (1/3) ... [2022-11-20 20:22:22,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637c3fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:22:22, skipping insertion in model container [2022-11-20 20:22:22,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:22:21" (2/3) ... [2022-11-20 20:22:22,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637c3fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:22:22, skipping insertion in model container [2022-11-20 20:22:22,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:22:22" (3/3) ... [2022-11-20 20:22:22,240 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2022-11-20 20:22:22,260 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:22:22,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:22:22,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:22:22,317 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;@61614d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:22:22,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:22:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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) [2022-11-20 20:22:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:22:22,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:22,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:22,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1813374179, now seen corresponding path program 1 times [2022-11-20 20:22:22,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:22,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863144872] [2022-11-20 20:22:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:22,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:22,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:22,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863144872] [2022-11-20 20:22:22,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863144872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:22,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:22,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:22:22,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409917739] [2022-11-20 20:22:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:22,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:22,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:22,807 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:22,991 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2022-11-20 20:22:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:22,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:22:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:23,002 INFO L225 Difference]: With dead ends: 33 [2022-11-20 20:22:23,002 INFO L226 Difference]: Without dead ends: 17 [2022-11-20 20:22:23,005 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 [2022-11-20 20:22:23,008 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:23,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-20 20:22:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-20 20:22:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2022-11-20 20:22:23,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2022-11-20 20:22:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:23,038 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2022-11-20 20:22:23,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2022-11-20 20:22:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:22:23,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:23,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:22:23,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1669124400, now seen corresponding path program 1 times [2022-11-20 20:22:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:23,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470554306] [2022-11-20 20:22:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:23,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:23,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470554306] [2022-11-20 20:22:23,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470554306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:23,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044246692] [2022-11-20 20:22:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:23,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:23,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:23,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:22:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:23,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:22:23,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:23,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:23,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044246692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:23,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:22:23,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 20:22:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131598464] [2022-11-20 20:22:23,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:23,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:22:23,454 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-20 20:22:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:23,568 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2022-11-20 20:22:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:23,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2022-11-20 20:22:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:23,570 INFO L225 Difference]: With dead ends: 39 [2022-11-20 20:22:23,570 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 20:22:23,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:22:23,572 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:23,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 20:22:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 20:22:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-11-20 20:22:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-11-20 20:22:23,578 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2022-11-20 20:22:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:23,579 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-11-20 20:22:23,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-20 20:22:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-11-20 20:22:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:22:23,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:23,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:23,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:23,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:23,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash 751608974, now seen corresponding path program 1 times [2022-11-20 20:22:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:23,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863562136] [2022-11-20 20:22:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:23,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:22:24,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:24,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863562136] [2022-11-20 20:22:24,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863562136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:24,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754712137] [2022-11-20 20:22:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:24,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:24,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:24,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:24,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:22:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:22:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:22:24,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:22:24,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754712137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:24,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924037991] [2022-11-20 20:22:24,341 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:22:24,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:22:24,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:22:24,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:22:24,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:22:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,457 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-20 20:22:25,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-20 20:22:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:26,834 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:22:26,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:22:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:27,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 20:22:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:28,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:28,302 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:22:28,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-20 20:22:29,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:22:29,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:29,493 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:29,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:29,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:29,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:29,594 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:29,595 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:29,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:29,708 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:29,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:29,776 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:29,776 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 15 treesize of output 15 [2022-11-20 20:22:29,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:29,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:29,884 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:29,885 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 118 treesize of output 137 [2022-11-20 20:22:30,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,032 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:30,079 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:30,079 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 15 treesize of output 15 [2022-11-20 20:22:30,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,248 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:30,249 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 118 treesize of output 137 [2022-11-20 20:22:30,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,355 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:30,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,391 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:30,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,472 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:30,472 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:30,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,538 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:30,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,574 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:30,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,650 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:30,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:30,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,716 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:30,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,752 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:30,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:30,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,853 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:30,853 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:30,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:30,946 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:30,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:31,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,015 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:31,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:31,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,087 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:31,088 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:31,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,155 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:31,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:31,191 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:31,191 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 15 treesize of output 15 [2022-11-20 20:22:31,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,315 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:31,315 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 118 treesize of output 137 [2022-11-20 20:22:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,462 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:31,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:31,510 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:31,510 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 15 treesize of output 15 [2022-11-20 20:22:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,624 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:31,625 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 118 treesize of output 137 [2022-11-20 20:22:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:31,749 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:31,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:31,777 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:22:32,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:22:32,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:22:32,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:22:32,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 20:22:32,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232058699] [2022-11-20 20:22:32,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:32,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:22:32,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:22:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:22:32,322 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2022-11-20 20:22:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:32,427 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-11-20 20:22:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:22:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) Word has length 24 [2022-11-20 20:22:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:32,428 INFO L225 Difference]: With dead ends: 52 [2022-11-20 20:22:32,428 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 20:22:32,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:22:32,430 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:32,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 20:22:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-20 20:22:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-20 20:22:32,435 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-20 20:22:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:32,435 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-20 20:22:32,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2022-11-20 20:22:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-20 20:22:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:22:32,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:32,436 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:32,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:32,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:32,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1445844837, now seen corresponding path program 2 times [2022-11-20 20:22:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:32,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917625079] [2022-11-20 20:22:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:22:32,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917625079] [2022-11-20 20:22:32,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917625079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21734835] [2022-11-20 20:22:32,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:22:32,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:32,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:32,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:32,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:22:32,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:22:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:22:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:22:33,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:22:33,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21734835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:33,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336538843] [2022-11-20 20:22:33,024 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:22:33,024 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:22:33,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:22:33,025 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:22:33,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:22:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,841 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-20 20:22:33,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-20 20:22:33,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:33,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:35,071 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:22:35,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:22:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:35,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 20:22:35,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:35,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:35,949 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:22:35,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-20 20:22:36,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:22:36,456 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:36,456 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 15 treesize of output 15 [2022-11-20 20:22:36,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,560 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:36,561 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 118 treesize of output 137 [2022-11-20 20:22:36,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,641 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:36,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:36,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,678 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:36,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:36,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,758 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:36,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:36,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,823 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:36,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:36,876 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:36,877 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 15 treesize of output 15 [2022-11-20 20:22:36,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:36,986 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:36,987 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 118 treesize of output 137 [2022-11-20 20:22:37,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,081 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,117 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:37,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,192 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:37,192 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:37,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,258 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,292 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:37,292 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 15 treesize of output 15 [2022-11-20 20:22:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,405 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:22:37,405 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 118 treesize of output 147 [2022-11-20 20:22:37,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,512 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,549 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:37,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,624 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:37,625 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:37,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,789 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:37,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,879 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:37,880 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:37,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:37,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:37,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:37,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:38,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:38,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:38,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:38,054 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:38,055 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:38,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:38,119 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:38,120 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 25 treesize of output 25 [2022-11-20 20:22:38,155 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:38,156 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 15 treesize of output 15 [2022-11-20 20:22:38,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:38,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:38,282 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:22:38,283 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 118 treesize of output 147 [2022-11-20 20:22:38,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:38,448 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:38,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:38,472 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:22:38,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:22:38,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:22:38,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:22:38,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 20:22:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996541571] [2022-11-20 20:22:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:38,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:22:38,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:22:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:22:38,879 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:39,047 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2022-11-20 20:22:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:22:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 20:22:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:39,051 INFO L225 Difference]: With dead ends: 77 [2022-11-20 20:22:39,051 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 20:22:39,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:22:39,053 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:39,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:22:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 20:22:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-20 20:22:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 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) [2022-11-20 20:22:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-20 20:22:39,060 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2022-11-20 20:22:39,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:39,061 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-20 20:22:39,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-20 20:22:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 20:22:39,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:39,062 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:39,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:39,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:39,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:39,269 INFO L85 PathProgramCache]: Analyzing trace with hash -783944797, now seen corresponding path program 3 times [2022-11-20 20:22:39,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:39,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844195918] [2022-11-20 20:22:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:39,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:22:39,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:39,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844195918] [2022-11-20 20:22:39,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844195918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:39,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341077833] [2022-11-20 20:22:39,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:22:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:39,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:39,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:22:39,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:22:39,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:22:39,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:22:39,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341077833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:39,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1721417562] [2022-11-20 20:22:39,814 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:22:39,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:22:39,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:22:39,815 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:22:39,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:22:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,539 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-20 20:22:40,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-20 20:22:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:41,632 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:22:41,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:22:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:41,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 20:22:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:42,340 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:22:42,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-20 20:22:43,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:22:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:43,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,205 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:43,206 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:43,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,298 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,369 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,448 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:43,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:43,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,515 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,555 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:43,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,632 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:43,633 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,724 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,788 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:43,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,864 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:43,864 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,933 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:43,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:43,966 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:43,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:44,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:44,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,031 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:44,032 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:44,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,107 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:44,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,142 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:44,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:44,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,215 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:44,216 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:44,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,307 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:44,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:44,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,374 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:44,374 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 25 treesize of output 25 [2022-11-20 20:22:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,448 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:44,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,511 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:44,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:44,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,546 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:44,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:44,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,678 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:44,678 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,798 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:44,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:44,842 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:44,842 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 15 treesize of output 15 [2022-11-20 20:22:44,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:44,947 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:44,948 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 118 treesize of output 137 [2022-11-20 20:22:45,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:45,049 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:45,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:45,076 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:22:45,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:22:45,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:22:45,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:22:45,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 20:22:45,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396455134] [2022-11-20 20:22:45,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:45,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:22:45,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:45,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:22:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:22:45,623 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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) [2022-11-20 20:22:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:45,700 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2022-11-20 20:22:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:22:45,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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 54 [2022-11-20 20:22:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:45,701 INFO L225 Difference]: With dead ends: 112 [2022-11-20 20:22:45,701 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 20:22:45,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:22:45,702 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:45,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 20:22:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-20 20:22:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 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) [2022-11-20 20:22:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-20 20:22:45,711 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2022-11-20 20:22:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:45,711 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-20 20:22:45,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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) [2022-11-20 20:22:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-20 20:22:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 20:22:45,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:45,717 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:45,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:45,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:45,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash 32937091, now seen corresponding path program 4 times [2022-11-20 20:22:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:45,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259847085] [2022-11-20 20:22:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:22:46,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259847085] [2022-11-20 20:22:46,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259847085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:46,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021313518] [2022-11-20 20:22:46,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:22:46,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:46,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:46,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:22:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:46,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:22:46,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:22:46,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:22:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021313518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870286987] [2022-11-20 20:22:46,963 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:22:46,964 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:22:46,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:22:46,964 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:22:46,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:22:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,076 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:22:48,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:22:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-20 20:22:48,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 20:22:48,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:48,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:48,870 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:22:48,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-20 20:22:49,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:22:49,632 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:49,633 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 15 treesize of output 15 [2022-11-20 20:22:49,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:49,746 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:49,746 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 118 treesize of output 137 [2022-11-20 20:22:49,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:49,856 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:49,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:49,894 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:49,894 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 15 treesize of output 15 [2022-11-20 20:22:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:49,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,010 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:50,010 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 118 treesize of output 137 [2022-11-20 20:22:50,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,119 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:50,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:50,160 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:50,160 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 15 treesize of output 15 [2022-11-20 20:22:50,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,268 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:22:50,268 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 118 treesize of output 147 [2022-11-20 20:22:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,419 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:50,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:50,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,450 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:50,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,526 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:50,527 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:50,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,599 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:50,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:50,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,661 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:50,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:50,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,741 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:50,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:50,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,803 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:50,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:50,835 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:50,836 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 15 treesize of output 15 [2022-11-20 20:22:50,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:50,941 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:50,942 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 118 treesize of output 137 [2022-11-20 20:22:51,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,055 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:51,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,091 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:51,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:51,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,169 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:51,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:51,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,237 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:51,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:51,273 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:51,274 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 15 treesize of output 15 [2022-11-20 20:22:51,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,395 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:22:51,395 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 118 treesize of output 147 [2022-11-20 20:22:51,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:51,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:51,515 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:51,515 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 15 treesize of output 15 [2022-11-20 20:22:51,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,627 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:51,628 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 118 treesize of output 137 [2022-11-20 20:22:51,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:51,745 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:51,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:51,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:22:52,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:22:52,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:22:52,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:22:52,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 20:22:52,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514591876] [2022-11-20 20:22:52,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:52,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 20:22:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 20:22:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:22:52,219 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:52,342 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2022-11-20 20:22:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 20:22:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 20:22:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:52,344 INFO L225 Difference]: With dead ends: 124 [2022-11-20 20:22:52,344 INFO L226 Difference]: Without dead ends: 74 [2022-11-20 20:22:52,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:22:52,346 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:52,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-20 20:22:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-20 20:22:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-11-20 20:22:52,357 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2022-11-20 20:22:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:52,357 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-11-20 20:22:52,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-11-20 20:22:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 20:22:52,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:52,359 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:52,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:52,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:52,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1552506435, now seen corresponding path program 5 times [2022-11-20 20:22:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:52,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180905302] [2022-11-20 20:22:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:22:53,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:53,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180905302] [2022-11-20 20:22:53,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180905302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:53,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025270539] [2022-11-20 20:22:53,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:22:53,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:53,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:53,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:53,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:22:54,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:22:54,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-20 20:22:54,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-20 20:22:54,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025270539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:54,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128311968] [2022-11-20 20:22:54,519 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:22:54,519 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:22:54,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:22:54,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:22:54,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:22:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:54,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,286 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-20 20:22:55,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-20 20:22:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:56,373 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:22:56,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:22:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:56,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 20:22:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:56,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:57,007 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:22:57,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-20 20:22:57,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:22:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:57,794 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:57,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:57,885 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:57,885 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:57,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:57,981 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:57,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:58,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,037 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:58,037 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 25 treesize of output 25 [2022-11-20 20:22:58,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,101 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:58,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:58,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,160 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:58,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:58,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,195 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:58,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:58,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,267 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:58,267 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:58,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,356 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:58,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:58,420 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:58,420 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 15 treesize of output 15 [2022-11-20 20:22:58,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,519 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:22:58,519 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 118 treesize of output 147 [2022-11-20 20:22:58,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,622 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:58,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:58,653 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:58,654 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 15 treesize of output 15 [2022-11-20 20:22:58,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,775 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:58,776 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 118 treesize of output 137 [2022-11-20 20:22:58,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,925 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:58,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:58,959 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:58,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,031 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:59,032 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:59,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,119 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:59,120 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 25 treesize of output 25 [2022-11-20 20:22:59,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,181 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:59,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:59,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,252 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:59,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:59,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,311 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:59,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:59,345 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:22:59,346 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 15 treesize of output 15 [2022-11-20 20:22:59,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,445 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:22:59,445 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 118 treesize of output 137 [2022-11-20 20:22:59,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,542 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:59,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:59,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,576 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:59,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,645 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:22:59,646 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:22:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:22:59,738 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:22:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:22:59,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:23:00,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:23:00,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:23:00,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:23:00,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-20 20:23:00,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519147889] [2022-11-20 20:23:00,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:00,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 20:23:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:23:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 20:23:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 20:23:00,435 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2022-11-20 20:23:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:00,871 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2022-11-20 20:23:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 20:23:00,873 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 72 [2022-11-20 20:23:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:00,876 INFO L225 Difference]: With dead ends: 179 [2022-11-20 20:23:00,876 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 20:23:00,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 20:23:00,878 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:00,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:23:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 20:23:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-20 20:23:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 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) [2022-11-20 20:23:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-11-20 20:23:00,915 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2022-11-20 20:23:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:00,917 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-11-20 20:23:00,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2022-11-20 20:23:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-11-20 20:23:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 20:23:00,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:00,922 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:00,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:01,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:01,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:23:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash -690482320, now seen corresponding path program 6 times [2022-11-20 20:23:01,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:23:01,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41347359] [2022-11-20 20:23:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:01,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:23:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 20:23:02,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:23:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41347359] [2022-11-20 20:23:02,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41347359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:23:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754328586] [2022-11-20 20:23:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:23:02,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:02,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:23:02,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:23:03,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:23:03,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:23:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 20:23:03,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 20:23:03,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754328586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682231670] [2022-11-20 20:23:03,961 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:23:03,961 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:23:03,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:23:03,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:23:03,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:23:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:04,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,090 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:23:05,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:23:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-20 20:23:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 20:23:05,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:05,727 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:23:05,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-20 20:23:06,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:23:06,094 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:06,094 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 15 treesize of output 15 [2022-11-20 20:23:06,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,196 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:23:06,196 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 118 treesize of output 137 [2022-11-20 20:23:06,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,297 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:06,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:06,329 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:06,330 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 15 treesize of output 15 [2022-11-20 20:23:06,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,454 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:23:06,454 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 118 treesize of output 147 [2022-11-20 20:23:06,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,572 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:06,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:06,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,601 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:06,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:06,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:06,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,672 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:06,673 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:06,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,759 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:06,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:06,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,823 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:06,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:06,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,887 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:06,888 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:06,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:06,947 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:06,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:06,981 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:06,981 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 15 treesize of output 15 [2022-11-20 20:23:07,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,082 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:23:07,083 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 118 treesize of output 137 [2022-11-20 20:23:07,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,156 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,188 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:07,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,263 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:07,263 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:07,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,374 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,453 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:07,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,544 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:07,545 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:07,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,618 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,658 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,753 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:07,754 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:07,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,826 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,869 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:07,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:07,940 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:07,941 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:08,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:08,025 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:08,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:08,063 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:23:10,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4299#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:23:10,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:23:10,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:23:10,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-20 20:23:10,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983895486] [2022-11-20 20:23:10,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:10,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 20:23:10,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:23:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 20:23:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 20:23:10,385 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 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) [2022-11-20 20:23:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:10,556 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2022-11-20 20:23:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 20:23:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 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 127 [2022-11-20 20:23:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:10,558 INFO L225 Difference]: With dead ends: 258 [2022-11-20 20:23:10,558 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 20:23:10,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 317 SyntacticMatches, 33 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 20:23:10,560 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:10,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:23:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 20:23:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-11-20 20:23:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 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) [2022-11-20 20:23:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2022-11-20 20:23:10,572 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 127 [2022-11-20 20:23:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:10,572 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2022-11-20 20:23:10,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 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) [2022-11-20 20:23:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2022-11-20 20:23:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-20 20:23:10,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:10,576 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:10,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:10,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:10,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:23:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2108370781, now seen corresponding path program 7 times [2022-11-20 20:23:10,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:23:10,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626484261] [2022-11-20 20:23:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:10,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:23:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 20:23:13,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:23:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626484261] [2022-11-20 20:23:13,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626484261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:23:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209237300] [2022-11-20 20:23:13,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:23:13,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:13,878 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:23:13,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:23:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 20:23:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 20:23:14,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 20:23:17,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209237300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:17,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53484760] [2022-11-20 20:23:17,547 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:23:17,547 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:23:17,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:23:17,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:23:17,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:23:17,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,288 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-20 20:23:18,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-20 20:23:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:18,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:19,481 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:23:19,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:23:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:19,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 20:23:20,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:20,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:20,090 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:23:20,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-20 20:23:20,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:23:20,836 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:20,837 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 15 treesize of output 15 [2022-11-20 20:23:20,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:20,921 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:23:20,921 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 118 treesize of output 137 [2022-11-20 20:23:20,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:20,994 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:20,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,026 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:21,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:21,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,085 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:21,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:21,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,163 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:21,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:21,200 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:21,202 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 15 treesize of output 15 [2022-11-20 20:23:21,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,307 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:23:21,308 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 118 treesize of output 147 [2022-11-20 20:23:21,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,401 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:21,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:21,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,437 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:21,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,497 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:21,497 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:21,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,565 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:21,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:21,601 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:21,601 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 15 treesize of output 15 [2022-11-20 20:23:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,695 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:23:21,696 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 118 treesize of output 147 [2022-11-20 20:23:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:21,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:21,832 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:21,832 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 15 treesize of output 15 [2022-11-20 20:23:21,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,923 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:23:21,923 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 118 treesize of output 137 [2022-11-20 20:23:21,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:21,998 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:21,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,032 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:22,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:22,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,098 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:22,098 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,161 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:22,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:22,196 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:22,196 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 15 treesize of output 15 [2022-11-20 20:23:22,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,315 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:23:22,315 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 118 treesize of output 137 [2022-11-20 20:23:22,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,394 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:22,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:22,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,427 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:22,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:22,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,481 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:22,481 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:22,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:22,562 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:22,563 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 25 treesize of output 25 [2022-11-20 20:23:22,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:23:24,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6121#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:23:24,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:23:24,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:23:24,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-20 20:23:24,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659859851] [2022-11-20 20:23:24,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:24,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-20 20:23:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:23:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-20 20:23:24,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 20:23:24,283 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 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) [2022-11-20 20:23:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:24,597 INFO L93 Difference]: Finished difference Result 308 states and 377 transitions. [2022-11-20 20:23:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 20:23:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 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 152 [2022-11-20 20:23:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:24,599 INFO L225 Difference]: With dead ends: 308 [2022-11-20 20:23:24,599 INFO L226 Difference]: Without dead ends: 204 [2022-11-20 20:23:24,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 389 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 20:23:24,604 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:24,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:23:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-20 20:23:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-20 20:23:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2022-11-20 20:23:24,617 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 152 [2022-11-20 20:23:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:24,618 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2022-11-20 20:23:24,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 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) [2022-11-20 20:23:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2022-11-20 20:23:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-20 20:23:24,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:24,622 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:24,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:24,832 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:23:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash -919818941, now seen corresponding path program 8 times [2022-11-20 20:23:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:23:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053339255] [2022-11-20 20:23:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:24,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:23:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 20:23:33,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:23:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053339255] [2022-11-20 20:23:33,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053339255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:23:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089528102] [2022-11-20 20:23:33,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:23:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:33,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:23:33,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:23:47,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:23:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:47,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:23:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-20 20:23:47,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-20 20:23:48,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089528102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:48,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854169086] [2022-11-20 20:23:48,258 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:23:48,258 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:23:48,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:23:48,259 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:23:48,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:23:48,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:48,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,412 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:23:49,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:23:49,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-20 20:23:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:49,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 20:23:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:50,042 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:23:50,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-20 20:23:50,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:23:50,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,418 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:50,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:50,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,478 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:50,478 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:50,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,560 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:50,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:50,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,618 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:50,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:50,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,676 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:50,676 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:50,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,749 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:50,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:50,782 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:50,782 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 15 treesize of output 15 [2022-11-20 20:23:50,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,892 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:23:50,892 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 118 treesize of output 147 [2022-11-20 20:23:50,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:50,990 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:50,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:51,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,034 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:51,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:51,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,091 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:51,091 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:51,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,157 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:51,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:51,189 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:51,190 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 15 treesize of output 15 [2022-11-20 20:23:51,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,282 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:23:51,282 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 118 treesize of output 147 [2022-11-20 20:23:51,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,385 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:51,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:51,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,420 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:51,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:51,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,475 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:51,476 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,594 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:51,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:51,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,649 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:51,649 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 25 treesize of output 25 [2022-11-20 20:23:51,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:23:51,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,710 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:23:51,711 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:23:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,777 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:51,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:51,804 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:51,805 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 15 treesize of output 15 [2022-11-20 20:23:51,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:51,891 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:23:51,892 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 118 treesize of output 147 [2022-11-20 20:23:52,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:52,030 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:52,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:52,065 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:23:52,065 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 15 treesize of output 15 [2022-11-20 20:23:52,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:52,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:52,173 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:23:52,173 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 118 treesize of output 147 [2022-11-20 20:23:52,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:23:52,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:23:52,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:23:52,296 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:23:53,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8465#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:23:53,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:23:53,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:23:53,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-20 20:23:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757385901] [2022-11-20 20:23:53,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:53,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-20 20:23:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:23:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-20 20:23:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 20:23:53,453 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 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) [2022-11-20 20:23:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:54,313 INFO L93 Difference]: Finished difference Result 417 states and 545 transitions. [2022-11-20 20:23:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-20 20:23:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 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) Word has length 202 [2022-11-20 20:23:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:54,315 INFO L225 Difference]: With dead ends: 417 [2022-11-20 20:23:54,315 INFO L226 Difference]: Without dead ends: 313 [2022-11-20 20:23:54,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 20:23:54,320 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:54,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:23:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-20 20:23:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-20 20:23:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0352564102564104) internal successors, (323), 312 states have internal predecessors, (323), 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) [2022-11-20 20:23:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2022-11-20 20:23:54,335 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 202 [2022-11-20 20:23:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:54,336 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2022-11-20 20:23:54,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 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) [2022-11-20 20:23:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2022-11-20 20:23:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-20 20:23:54,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:54,341 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:54,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:54,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:54,542 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:23:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:54,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2031454384, now seen corresponding path program 9 times [2022-11-20 20:23:54,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:23:54,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102044920] [2022-11-20 20:23:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:54,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:23:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-20 20:24:03,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:24:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102044920] [2022-11-20 20:24:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102044920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:24:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61082571] [2022-11-20 20:24:03,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:24:03,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:03,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:03,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:24:04,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:24:04,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-20 20:24:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-20 20:24:04,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-20 20:24:16,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61082571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:16,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616968559] [2022-11-20 20:24:16,718 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:24:16,718 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:24:16,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:24:16,719 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:24:16,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:24:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,451 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-20 20:24:17,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-20 20:24:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:18,551 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:24:18,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:24:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:18,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 20:24:19,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:19,121 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:24:19,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-20 20:24:19,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:24:19,464 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:24:19,465 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 15 treesize of output 15 [2022-11-20 20:24:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:19,592 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:24:19,592 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 118 treesize of output 147 [2022-11-20 20:24:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:19,713 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:19,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:19,743 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:24:19,743 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 15 treesize of output 15 [2022-11-20 20:24:19,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:19,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:19,843 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:24:19,843 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 118 treesize of output 147 [2022-11-20 20:24:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:19,957 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:19,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:19,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:19,994 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:19,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:20,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,048 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:24:20,048 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:24:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,125 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,183 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:20,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,238 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:24:20,239 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:24:20,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,295 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,331 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,403 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:24:20,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:24:20,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,460 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,460 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 25 treesize of output 25 [2022-11-20 20:24:20,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,493 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:20,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,561 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:24:20,561 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:24:20,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,638 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,698 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,763 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:24:20,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:24:20,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,822 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:20,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:20,856 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:24:20,856 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 15 treesize of output 15 [2022-11-20 20:24:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:20,959 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:24:20,960 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 118 treesize of output 137 [2022-11-20 20:24:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:21,048 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:21,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:21,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:21,079 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:21,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:24:21,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:21,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:21,131 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:24:21,132 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:24:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:24:21,212 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:24:21,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:24:21,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:24:33,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11979#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:24:33,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:24:33,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:24:33,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-20 20:24:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903322736] [2022-11-20 20:24:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:33,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-20 20:24:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:24:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-20 20:24:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-20 20:24:33,839 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 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) [2022-11-20 20:24:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:34,382 INFO L93 Difference]: Finished difference Result 626 states and 746 transitions. [2022-11-20 20:24:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-20 20:24:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 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 311 [2022-11-20 20:24:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:34,386 INFO L225 Difference]: With dead ends: 626 [2022-11-20 20:24:34,386 INFO L226 Difference]: Without dead ends: 414 [2022-11-20 20:24:34,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 757 SyntacticMatches, 69 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22596 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-20 20:24:34,390 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:34,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:24:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-20 20:24:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-11-20 20:24:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.026634382566586) internal successors, (424), 413 states have internal predecessors, (424), 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) [2022-11-20 20:24:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 424 transitions. [2022-11-20 20:24:34,408 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 424 transitions. Word has length 311 [2022-11-20 20:24:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:34,409 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 424 transitions. [2022-11-20 20:24:34,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 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) [2022-11-20 20:24:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 424 transitions. [2022-11-20 20:24:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-20 20:24:34,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:34,418 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:34,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 20:24:34,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:34,636 INFO L85 PathProgramCache]: Analyzing trace with hash 942571171, now seen corresponding path program 10 times [2022-11-20 20:24:34,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:24:34,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663733366] [2022-11-20 20:24:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:24:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-20 20:25:03,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663733366] [2022-11-20 20:25:03,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663733366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823715626] [2022-11-20 20:25:03,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:25:03,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:03,778 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:03,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:25:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:04,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 3443 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-20 20:25:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-20 20:25:05,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-20 20:25:54,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823715626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:54,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080722965] [2022-11-20 20:25:54,961 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:25:54,961 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:25:54,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:25:54,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:25:54,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:25:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,678 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-20 20:25:55,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-20 20:25:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:56,751 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-20 20:25:56,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-20 20:25:56,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:56,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 20:25:57,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:57,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:57,560 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:25:57,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-20 20:25:58,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:25:58,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,348 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:58,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:58,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,413 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:25:58,414 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:25:58,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,511 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:58,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:58,570 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:25:58,570 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 15 treesize of output 15 [2022-11-20 20:25:58,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,684 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:25:58,685 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 118 treesize of output 147 [2022-11-20 20:25:58,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,819 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:58,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:58,851 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:25:58,852 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 15 treesize of output 15 [2022-11-20 20:25:58,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:58,935 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:25:58,936 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 118 treesize of output 137 [2022-11-20 20:25:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,009 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:59,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:59,042 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:25:59,042 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 15 treesize of output 15 [2022-11-20 20:25:59,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,136 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:25:59,136 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 118 treesize of output 137 [2022-11-20 20:25:59,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,223 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:59,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:59,254 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:25:59,254 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 15 treesize of output 15 [2022-11-20 20:25:59,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,342 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:25:59,342 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 118 treesize of output 147 [2022-11-20 20:25:59,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,467 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:59,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:59,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,500 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:59,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:59,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:59,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,557 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:25:59,558 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:25:59,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,633 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:59,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:59,687 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:25:59,688 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 15 treesize of output 15 [2022-11-20 20:25:59,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,774 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:25:59,774 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 118 treesize of output 137 [2022-11-20 20:25:59,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,858 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:59,858 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 25 treesize of output 25 [2022-11-20 20:25:59,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,892 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:25:59,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:25:59,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:25:59,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:25:59,948 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:25:59,948 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:25:59,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:00,010 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:00,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:00,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:00,043 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:00,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:00,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:00,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:00,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:00,106 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:26:00,107 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-20 20:26:00,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:00,186 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:00,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:00,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:26:01,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16921#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-20 20:26:01,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:26:01,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:26:01,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-20 20:26:01,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770446177] [2022-11-20 20:26:01,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:26:01,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-20 20:26:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-20 20:26:01,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-20 20:26:01,923 INFO L87 Difference]: Start difference. First operand 414 states and 424 transitions. Second operand has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 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) [2022-11-20 20:26:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:04,212 INFO L93 Difference]: Finished difference Result 828 states and 1049 transitions. [2022-11-20 20:26:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-20 20:26:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 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 412 [2022-11-20 20:26:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:04,217 INFO L225 Difference]: With dead ends: 828 [2022-11-20 20:26:04,217 INFO L226 Difference]: Without dead ends: 616 [2022-11-20 20:26:04,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-20 20:26:04,227 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:04,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:26:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-20 20:26:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-11-20 20:26:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.0178861788617886) internal successors, (626), 615 states have internal predecessors, (626), 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) [2022-11-20 20:26:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 626 transitions. [2022-11-20 20:26:04,252 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 626 transitions. Word has length 412 [2022-11-20 20:26:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:04,253 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 626 transitions. [2022-11-20 20:26:04,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 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) [2022-11-20 20:26:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 626 transitions. [2022-11-20 20:26:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-11-20 20:26:04,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:04,258 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:04,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 20:26:04,470 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1858173245, now seen corresponding path program 11 times [2022-11-20 20:26:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:04,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971302985] [2022-11-20 20:26:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 83280 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-20 20:28:00,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:28:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971302985] [2022-11-20 20:28:00,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971302985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:28:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083005670] [2022-11-20 20:28:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:28:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:28:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:28:00,607 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:28:00,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07b3709c-d3c7-474e-9d69-67ca0ed6676a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process