./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:44:04,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:44:04,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:44:04,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:44:04,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:44:04,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:44:04,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:44:04,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:44:04,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:44:04,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:44:04,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:44:04,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:44:04,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:44:04,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:44:04,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:44:04,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:44:04,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:44:04,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:44:04,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:44:04,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:44:04,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:44:04,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:44:04,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:44:04,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:44:04,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:44:04,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:44:04,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:44:04,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:44:04,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:44:04,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:44:04,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:44:04,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:44:04,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:44:04,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:44:04,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:44:04,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:44:04,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:44:04,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:44:04,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:44:04,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:44:04,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:44:04,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:44:04,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:44:04,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:44:04,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:44:04,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:44:04,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:44:04,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:44:04,580 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:44:04,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:44:04,581 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:44:04,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:44:04,582 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:44:04,582 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:44:04,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:44:04,583 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:44:04,583 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:44:04,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:44:04,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:44:04,584 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:44:04,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:44:04,585 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:44:04,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:44:04,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:44:04,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:44:04,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:44:04,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:44:04,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:44:04,586 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:44:04,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:44:04,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:44:04,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:44:04,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:44:04,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:44:04,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:04,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:44:04,588 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:44:04,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:44:04,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:44:04,589 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:44:04,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:44:04,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:44:04,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:44:04,595 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_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 [2022-11-03 01:44:04,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:44:05,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:44:05,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:44:05,011 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:44:05,011 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:44:05,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2022-11-03 01:44:05,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/data/6eec4e328/3d81f09d4db34f72a692f6fa32b87c5d/FLAG2fce8231e [2022-11-03 01:44:05,759 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:44:05,760 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2022-11-03 01:44:05,768 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/data/6eec4e328/3d81f09d4db34f72a692f6fa32b87c5d/FLAG2fce8231e [2022-11-03 01:44:06,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/data/6eec4e328/3d81f09d4db34f72a692f6fa32b87c5d [2022-11-03 01:44:06,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:44:06,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:44:06,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:06,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:44:06,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:44:06,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26409cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06, skipping insertion in model container [2022-11-03 01:44:06,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:44:06,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:44:06,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2022-11-03 01:44:06,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:06,353 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:44:06,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2022-11-03 01:44:06,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:06,398 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:44:06,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06 WrapperNode [2022-11-03 01:44:06,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:06,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:06,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:44:06,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:44:06,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,452 INFO L138 Inliner]: procedures = 16, calls = 54, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 179 [2022-11-03 01:44:06,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:06,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:44:06,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:44:06,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:44:06,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:44:06,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:44:06,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:44:06,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:44:06,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (1/1) ... [2022-11-03 01:44:06,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:06,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:06,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:44:06,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:44:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:44:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:44:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:44:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:44:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:44:06,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:44:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:44:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:44:06,762 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:44:06,766 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:44:07,094 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:44:07,206 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:44:07,206 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-03 01:44:07,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:07 BoogieIcfgContainer [2022-11-03 01:44:07,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:44:07,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:44:07,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:44:07,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:44:07,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:44:06" (1/3) ... [2022-11-03 01:44:07,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8d003e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:07, skipping insertion in model container [2022-11-03 01:44:07,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:06" (2/3) ... [2022-11-03 01:44:07,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8d003e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:07, skipping insertion in model container [2022-11-03 01:44:07,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:07" (3/3) ... [2022-11-03 01:44:07,232 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2022-11-03 01:44:07,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:44:07,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:44:07,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:44:07,363 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;@12b1b137, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:44:07,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:44:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:44:07,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:07,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:07,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1416400191, now seen corresponding path program 1 times [2022-11-03 01:44:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:07,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750604325] [2022-11-03 01:44:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:07,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750604325] [2022-11-03 01:44:07,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750604325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:07,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:07,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:44:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71767786] [2022-11-03 01:44:07,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:44:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:44:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:44:08,002 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:08,128 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2022-11-03 01:44:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:44:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:44:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:08,140 INFO L225 Difference]: With dead ends: 31 [2022-11-03 01:44:08,140 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 01:44:08,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:44:08,147 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:08,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 01:44:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 01:44:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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) [2022-11-03 01:44:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 25 transitions. [2022-11-03 01:44:08,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 25 transitions. Word has length 13 [2022-11-03 01:44:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:08,185 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 25 transitions. [2022-11-03 01:44:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 25 transitions. [2022-11-03 01:44:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:44:08,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:08,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:08,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:44:08,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1959779971, now seen corresponding path program 1 times [2022-11-03 01:44:08,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:08,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257949517] [2022-11-03 01:44:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:08,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:08,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:08,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257949517] [2022-11-03 01:44:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257949517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956335632] [2022-11-03 01:44:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:08,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:08,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:08,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:08,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:44:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:44:08,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:44:08,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:08,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956335632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:08,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:44:08,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 01:44:08,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178164476] [2022-11-03 01:44:08,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:08,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:44:08,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:08,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:44:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:08,605 INFO L87 Difference]: Start difference. First operand 16 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-03 01:44:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:08,732 INFO L93 Difference]: Finished difference Result 36 states and 60 transitions. [2022-11-03 01:44:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:44:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 [2022-11-03 01:44:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:08,734 INFO L225 Difference]: With dead ends: 36 [2022-11-03 01:44:08,734 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 01:44:08,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:08,736 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:08,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 01:44:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-03 01:44:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-11-03 01:44:08,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 14 [2022-11-03 01:44:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:08,752 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-11-03 01:44:08,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-03 01:44:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-11-03 01:44:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:44:08,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:08,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:08,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:08,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1111026535, now seen corresponding path program 1 times [2022-11-03 01:44:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:08,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109605757] [2022-11-03 01:44:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:08,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:44:09,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:09,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109605757] [2022-11-03 01:44:09,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109605757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:09,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646547549] [2022-11-03 01:44:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:09,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:09,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:09,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:09,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:44:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:09,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:44:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:44:09,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:44:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646547549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877538190] [2022-11-03 01:44:09,513 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:44:09,513 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:09,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:09,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:09,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:09,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,473 INFO L356 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-03 01:44:10,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-03 01:44:10,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:11,638 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:44:11,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:44:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:12,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:12,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:44:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:12,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:12,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:13,029 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:44:13,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-03 01:44:15,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:15,610 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:44:15,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:44:15,655 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:15,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:15,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:15,779 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:15,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:15,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:15,905 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:15,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:15,945 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:15,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,023 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:16,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:16,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,135 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:16,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:16,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,204 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:16,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:16,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,296 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:16,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:16,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,377 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:16,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:16,421 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:16,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:16,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,548 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:16,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:16,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,689 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:16,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:16,733 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:16,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,857 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:16,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:44:16,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,962 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:16,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:16,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:16,996 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:16,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,072 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:17,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:17,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,136 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:17,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:17,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,178 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:17,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:17,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,275 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:17,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:17,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,389 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:17,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:17,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,455 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:17,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:17,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,523 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:17,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:17,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:17,590 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:17,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:17,613 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:18,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:18,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:18,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:18,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 01:44:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543599697] [2022-11-03 01:44:18,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:18,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:44:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:44:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:18,089 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2022-11-03 01:44:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:18,160 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-11-03 01:44:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:44:18,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 01:44:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:18,161 INFO L225 Difference]: With dead ends: 48 [2022-11-03 01:44:18,162 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 01:44:18,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:18,163 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:18,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 01:44:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 01:44:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-11-03 01:44:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-11-03 01:44:18,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 22 [2022-11-03 01:44:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:18,169 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-11-03 01:44:18,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2022-11-03 01:44:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-11-03 01:44:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:44:18,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:18,170 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] [2022-11-03 01:44:18,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:18,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:18,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1068781347, now seen corresponding path program 2 times [2022-11-03 01:44:18,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:18,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467410496] [2022-11-03 01:44:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:18,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467410496] [2022-11-03 01:44:18,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467410496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346094675] [2022-11-03 01:44:18,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:18,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:18,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:18,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:44:18,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:44:18,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:44:18,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:18,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346094675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22963519] [2022-11-03 01:44:18,779 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:44:18,780 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:18,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:18,780 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:18,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,804 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:44:19,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:44:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:19,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-03 01:44:20,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 01:44:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:20,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:20,631 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 01:44:20,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-03 01:44:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,024 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:44:21,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:44:21,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,073 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:21,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:21,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,140 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:21,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,213 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:21,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:21,254 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:21,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:21,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,368 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:21,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-03 01:44:21,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,469 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:21,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:21,505 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:21,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:21,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,611 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:21,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,711 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:21,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:21,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,744 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:21,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,817 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:21,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:21,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,883 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:21,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,916 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:21,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:21,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:21,988 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:21,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:22,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,074 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:22,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,133 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:22,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:22,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,202 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:22,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:22,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,258 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:22,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:22,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,287 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:22,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:22,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,349 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:22,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:22,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,426 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:22,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:22,514 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:22,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:22,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,634 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:22,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:22,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:22,748 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:22,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:22,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:23,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:23,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:23,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:23,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 01:44:23,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762573497] [2022-11-03 01:44:23,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:23,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:44:23,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:44:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:23,241 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:23,411 INFO L93 Difference]: Finished difference Result 70 states and 110 transitions. [2022-11-03 01:44:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:44:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 01:44:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:23,413 INFO L225 Difference]: With dead ends: 70 [2022-11-03 01:44:23,413 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 01:44:23,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:44:23,415 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:23,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:44:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 01:44:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-03 01:44:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-03 01:44:23,423 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 25 [2022-11-03 01:44:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:23,424 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-03 01:44:23,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-03 01:44:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:44:23,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:23,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:23,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:23,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:23,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash -683910209, now seen corresponding path program 3 times [2022-11-03 01:44:23,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:23,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146753790] [2022-11-03 01:44:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:23,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:44:23,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146753790] [2022-11-03 01:44:23,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146753790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335474682] [2022-11-03 01:44:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:23,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:23,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:23,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:44:24,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:24,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:44:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:44:24,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:44:24,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335474682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69089718] [2022-11-03 01:44:24,230 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:44:24,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:24,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:24,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:24,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,765 INFO L356 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-03 01:44:24,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-03 01:44:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:24,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:25,600 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:44:25,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:44:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:25,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:44:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:26,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:26,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:26,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:26,266 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:44:26,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-03 01:44:27,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:27,964 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:44:27,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:44:28,009 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:28,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:28,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,125 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:28,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:28,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,230 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:28,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:28,260 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:28,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:28,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,352 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:28,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:28,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,429 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:28,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:28,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,462 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:28,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:28,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:28,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,525 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:28,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:28,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,589 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:28,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:28,633 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:28,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:28,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,731 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:28,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,807 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:28,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:28,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,842 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:28,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:28,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,905 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:28,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:28,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:28,983 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:28,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:29,048 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:29,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:29,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,149 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:29,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:29,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,226 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:29,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:29,263 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:29,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:29,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,389 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:29,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:29,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,493 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:29,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:29,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,526 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:29,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:29,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,594 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:29,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:29,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:29,655 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:29,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:29,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:30,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1209#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:30,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:30,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:30,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 01:44:30,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117980603] [2022-11-03 01:44:30,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:30,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:44:30,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:30,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:44:30,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:44:30,170 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:30,259 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-11-03 01:44:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:44:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-03 01:44:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:30,260 INFO L225 Difference]: With dead ends: 102 [2022-11-03 01:44:30,261 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 01:44:30,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:44:30,262 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:30,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 01:44:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-03 01:44:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 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) [2022-11-03 01:44:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-11-03 01:44:30,269 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 49 [2022-11-03 01:44:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:30,270 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-11-03 01:44:30,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-11-03 01:44:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:44:30,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:30,271 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:30,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:30,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:30,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash -925125313, now seen corresponding path program 4 times [2022-11-03 01:44:30,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:30,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074002852] [2022-11-03 01:44:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:44:31,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:31,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074002852] [2022-11-03 01:44:31,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074002852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:31,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168419460] [2022-11-03 01:44:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:44:31,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:31,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:31,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:44:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:44:31,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:44:31,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:44:31,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168419460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:31,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623295460] [2022-11-03 01:44:31,507 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:44:31,507 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:31,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:31,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:31,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:31,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,125 INFO L356 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-03 01:44:32,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-03 01:44:32,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:32,978 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:44:32,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:44:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:33,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:44:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:33,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:33,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:33,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:33,724 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:44:33,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-03 01:44:35,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,287 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:44:35,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:44:35,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,322 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:35,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,387 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:35,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:35,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,446 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:35,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:35,491 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:35,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:35,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,600 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:35,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:35,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,675 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:35,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:35,707 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:35,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:35,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,808 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:35,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:44:35,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:35,910 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:35,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:35,968 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:35,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:36,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,065 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:36,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:36,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,149 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,182 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,250 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:36,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,330 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,390 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,457 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:36,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,534 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,566 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:36,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:36,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,684 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:36,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:36,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,772 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,806 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,870 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:36,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:36,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:36,924 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:36,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:36,948 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:37,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1867#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:37,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:37,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:37,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 01:44:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568233545] [2022-11-03 01:44:37,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:44:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:37,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:44:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:44:37,500 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:37,613 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-11-03 01:44:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:44:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-03 01:44:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:37,614 INFO L225 Difference]: With dead ends: 114 [2022-11-03 01:44:37,614 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 01:44:37,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:44:37,616 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:37,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 01:44:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-03 01:44:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 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) [2022-11-03 01:44:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-11-03 01:44:37,625 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 55 [2022-11-03 01:44:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:37,625 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-11-03 01:44:37,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-11-03 01:44:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:44:37,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:37,627 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:37,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:37,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:44:37,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1898510273, now seen corresponding path program 5 times [2022-11-03 01:44:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:37,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819781716] [2022-11-03 01:44:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:37,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:44:38,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819781716] [2022-11-03 01:44:38,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819781716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271910432] [2022-11-03 01:44:38,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:38,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:38,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:39,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:39,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:44:39,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:44:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-03 01:44:39,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-03 01:44:40,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271910432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:40,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000240501] [2022-11-03 01:44:40,041 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:44:40,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:40,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:40,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:40,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,897 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:44:40,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:44:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-03 01:44:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:41,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:44:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:41,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:41,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:41,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:41,688 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:44:41,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-03 01:44:43,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,343 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:44:43,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:44:43,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,381 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:43,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,434 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:43,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:43,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,494 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:43,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:43,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,529 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:43,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,591 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:43,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:43,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,673 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:43,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:43,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,730 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:43,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,795 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:43,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:43,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,851 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:43,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,886 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:43,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:43,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,946 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:43,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:43,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,002 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:44,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:44,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,035 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:44,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:44,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,102 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:44,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:44,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,213 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:44,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:44,290 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:44,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:44,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,417 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:44,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:44:44,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,588 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:44,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:44,619 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:44,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,707 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:44,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:44,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,782 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:44,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:44,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,815 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:44,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:44,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:44,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,870 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:44,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:44,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:44,955 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:44,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:44,979 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:46,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2655#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:46,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:46,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:46,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-03 01:44:46,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588712153] [2022-11-03 01:44:46,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:46,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 01:44:46,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 01:44:46,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:44:46,045 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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) [2022-11-03 01:44:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:46,401 INFO L93 Difference]: Finished difference Result 163 states and 229 transitions. [2022-11-03 01:44:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 01:44:46,401 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 01:44:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:46,402 INFO L225 Difference]: With dead ends: 163 [2022-11-03 01:44:46,402 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 01:44:46,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 175 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:44:46,404 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:46,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:44:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 01:44:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-03 01:44:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 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) [2022-11-03 01:44:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2022-11-03 01:44:46,428 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 67 [2022-11-03 01:44:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:46,430 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2022-11-03 01:44:46,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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) [2022-11-03 01:44:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2022-11-03 01:44:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 01:44:46,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:46,435 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:46,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:46,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:46,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:46,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:46,644 INFO L85 PathProgramCache]: Analyzing trace with hash -888773949, now seen corresponding path program 6 times [2022-11-03 01:44:46,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:46,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746270200] [2022-11-03 01:44:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:46,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-03 01:44:48,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:48,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746270200] [2022-11-03 01:44:48,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746270200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:48,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874318525] [2022-11-03 01:44:48,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:48,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:48,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:48,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:48,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:44:48,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:48,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:48,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:44:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-03 01:44:48,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-03 01:44:49,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874318525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:49,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104256706] [2022-11-03 01:44:49,292 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:44:49,292 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:49,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:49,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:49,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,173 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:44:50,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:44:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-03 01:44:50,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 01:44:50,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:50,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:50,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:50,895 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 01:44:50,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-03 01:44:51,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,220 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:44:51,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:44:51,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,260 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:51,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,321 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:51,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:51,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,376 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:51,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:51,401 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:51,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:51,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,500 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:51,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:44:51,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,579 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:51,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:51,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,611 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:51,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:51,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:51,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,680 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:51,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:51,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,733 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:51,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:51,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,767 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:51,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:51,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,843 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:51,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:51,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,897 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:51,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:51,928 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:51,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:51,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:51,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,039 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:52,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:44:52,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,117 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:52,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:52,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,151 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:52,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:52,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,224 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:52,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,323 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:52,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:52,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,357 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:52,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:52,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,433 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:52,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:44:52,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,520 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:52,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:52,597 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:52,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:52,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,714 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:52,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:44:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,810 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:52,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:52,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:53,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3949#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:53,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:53,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:53,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-03 01:44:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628744251] [2022-11-03 01:44:53,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:53,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 01:44:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 01:44:53,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:44:53,868 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 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) [2022-11-03 01:44:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:54,050 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2022-11-03 01:44:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 01:44:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 01:44:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:54,052 INFO L225 Difference]: With dead ends: 236 [2022-11-03 01:44:54,052 INFO L226 Difference]: Without dead ends: 143 [2022-11-03 01:44:54,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 306 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:44:54,054 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:54,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:44:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-03 01:44:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-03 01:44:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 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) [2022-11-03 01:44:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2022-11-03 01:44:54,076 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 116 [2022-11-03 01:44:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:54,077 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2022-11-03 01:44:54,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 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) [2022-11-03 01:44:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2022-11-03 01:44:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 01:44:54,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:54,083 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:54,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:54,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:44:54,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:54,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1186050815, now seen corresponding path program 7 times [2022-11-03 01:44:54,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:54,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896815667] [2022-11-03 01:44:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:54,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-03 01:44:58,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896815667] [2022-11-03 01:44:58,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896815667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7892862] [2022-11-03 01:44:58,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:44:58,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:58,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:58,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:44:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 01:44:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-03 01:44:58,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-03 01:45:02,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7892862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:02,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262668342] [2022-11-03 01:45:02,467 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:45:02,467 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:02,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:02,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:02,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,128 INFO L356 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-03 01:45:03,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-03 01:45:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:03,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:04,004 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:45:04,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:45:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:04,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:45:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:04,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:04,567 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:45:04,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-03 01:45:06,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:06,643 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:45:06,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:45:06,685 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:45:06,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:45:06,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:06,784 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:45:06,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:45:06,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:06,860 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:06,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:06,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:06,900 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:06,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:06,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:06,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:06,974 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:06,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:07,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,049 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:07,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:07,122 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:45:07,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:45:07,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,221 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:45:07,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:45:07,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,347 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:07,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:07,383 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:45:07,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:45:07,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,502 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:45:07,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:45:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,604 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:07,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:07,645 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:45:07,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:45:07,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,752 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:45:07,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:45:07,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,834 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:07,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:07,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,877 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:07,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:07,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:07,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:07,950 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:07,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:07,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,011 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:08,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:08,048 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:45:08,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:45:08,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,143 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:45:08,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:45:08,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,300 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:08,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:08,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,337 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:08,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,403 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:08,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:08,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,463 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:08,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:08,485 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:10,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:10,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:10,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:45:10,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-03 01:45:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892775501] [2022-11-03 01:45:10,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 01:45:10,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:10,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 01:45:10,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 01:45:10,218 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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) [2022-11-03 01:45:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:10,489 INFO L93 Difference]: Finished difference Result 286 states and 353 transitions. [2022-11-03 01:45:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 01:45:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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 141 [2022-11-03 01:45:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:10,491 INFO L225 Difference]: With dead ends: 286 [2022-11-03 01:45:10,491 INFO L226 Difference]: Without dead ends: 193 [2022-11-03 01:45:10,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 356 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 01:45:10,494 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:10,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:45:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-03 01:45:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-03 01:45:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0520833333333333) internal successors, (202), 192 states have internal predecessors, (202), 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) [2022-11-03 01:45:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 202 transitions. [2022-11-03 01:45:10,510 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 202 transitions. Word has length 141 [2022-11-03 01:45:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:10,510 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 202 transitions. [2022-11-03 01:45:10,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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) [2022-11-03 01:45:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 202 transitions. [2022-11-03 01:45:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-03 01:45:10,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:10,513 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:10,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:10,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:10,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash -215865473, now seen corresponding path program 8 times [2022-11-03 01:45:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:10,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869044042] [2022-11-03 01:45:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-03 01:45:20,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:20,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869044042] [2022-11-03 01:45:20,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869044042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:20,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468266743] [2022-11-03 01:45:20,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:45:20,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:20,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:20,770 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:20,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:45:40,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 01:45:40,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:45:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:45:40,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5236 trivial. 0 not checked. [2022-11-03 01:45:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5236 trivial. 0 not checked. [2022-11-03 01:45:41,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468266743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011077394] [2022-11-03 01:45:41,321 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:45:41,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:41,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:41,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:41,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,841 INFO L356 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-03 01:45:41,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-03 01:45:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:42,651 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:45:42,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:45:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:42,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 01:45:43,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,248 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 01:45:43,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-03 01:45:43,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,524 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:45:43,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:45:43,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,561 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:43,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,613 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:43,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:43,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,674 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:43,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:43,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,703 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:43,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:43,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,756 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:43,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:43,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,831 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:43,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,882 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:43,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,933 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:43,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:43,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,988 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:43,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,014 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:45:44,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:45:44,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,100 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:45:44,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:45:44,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,181 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:44,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,216 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:44,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,288 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:44,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,372 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:44,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,430 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:44,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,496 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:44,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:44,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,551 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:44,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,585 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:44,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:44,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,661 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:45:44,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:45:44,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,740 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:44,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:44,791 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:45:44,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:45:44,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,923 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:45:44,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:45:44,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:45,001 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:45:45,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:45:45,023 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:51,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7851#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:51,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:51,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:45:51,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-03 01:45:51,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902379605] [2022-11-03 01:45:51,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:51,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-03 01:45:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-03 01:45:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 01:45:51,881 INFO L87 Difference]: Start difference. First operand 193 states and 202 transitions. Second operand has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:52,726 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2022-11-03 01:45:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-03 01:45:52,727 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-11-03 01:45:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:52,729 INFO L225 Difference]: With dead ends: 383 [2022-11-03 01:45:52,730 INFO L226 Difference]: Without dead ends: 290 [2022-11-03 01:45:52,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 512 SyntacticMatches, 33 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7058 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 01:45:52,736 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:52,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:45:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-03 01:45:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-11-03 01:45:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0346020761245676) internal successors, (299), 289 states have internal predecessors, (299), 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) [2022-11-03 01:45:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 299 transitions. [2022-11-03 01:45:52,759 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 299 transitions. Word has length 191 [2022-11-03 01:45:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:52,759 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 299 transitions. [2022-11-03 01:45:52,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 299 transitions. [2022-11-03 01:45:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-03 01:45:52,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:52,764 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:52,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-03 01:45:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:45:52,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:52,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2087274563, now seen corresponding path program 9 times [2022-11-03 01:45:52,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:52,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435830421] [2022-11-03 01:45:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:46:03,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:46:03,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435830421] [2022-11-03 01:46:03,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435830421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396490713] [2022-11-03 01:46:03,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:46:03,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:03,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:03,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:03,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:46:04,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:46:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:46:04,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 3141 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 01:46:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:46:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:46:17,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396490713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562824752] [2022-11-03 01:46:17,127 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:46:17,127 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:46:17,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:46:17,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:46:17,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:46:17,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:17,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,025 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:46:18,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:46:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-03 01:46:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 01:46:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:18,583 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 01:46:18,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-03 01:46:18,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:18,909 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:46:18,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:46:18,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:18,948 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:18,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:18,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,014 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:19,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:46:19,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,070 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:19,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:19,102 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:46:19,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:46:19,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,187 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:46:19,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:46:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,289 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:19,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:19,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,322 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:19,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,381 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:19,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:46:19,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,440 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:19,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:19,475 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:46:19,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:46:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,575 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:46:19,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:46:19,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,690 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:19,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:19,731 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:46:19,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:46:19,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,852 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:46:19,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:46:19,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:19,998 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:19,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:20,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,036 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:20,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:20,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:20,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,098 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:20,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:46:20,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,163 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:20,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:20,205 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:46:20,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:46:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,299 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:46:20,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:46:20,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,398 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:20,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:20,433 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:46:20,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:46:20,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,531 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:46:20,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:46:20,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:20,606 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:20,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:20,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:46:21,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11113#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:46:21,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:46:21,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:46:21,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-03 01:46:21,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081133493] [2022-11-03 01:46:21,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:21,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-03 01:46:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:46:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-03 01:46:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 01:46:21,532 INFO L87 Difference]: Start difference. First operand 290 states and 299 transitions. Second operand has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 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) [2022-11-03 01:46:22,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:22,389 INFO L93 Difference]: Finished difference Result 580 states and 698 transitions. [2022-11-03 01:46:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-03 01:46:22,390 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 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 288 [2022-11-03 01:46:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:22,393 INFO L225 Difference]: With dead ends: 580 [2022-11-03 01:46:22,393 INFO L226 Difference]: Without dead ends: 391 [2022-11-03 01:46:22,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 757 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 01:46:22,398 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:22,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:46:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-03 01:46:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2022-11-03 01:46:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0256410256410255) internal successors, (400), 390 states have internal predecessors, (400), 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) [2022-11-03 01:46:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 400 transitions. [2022-11-03 01:46:22,423 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 400 transitions. Word has length 288 [2022-11-03 01:46:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:22,424 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 400 transitions. [2022-11-03 01:46:22,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 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) [2022-11-03 01:46:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 400 transitions. [2022-11-03 01:46:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-03 01:46:22,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:22,434 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:22,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:22,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:46:22,656 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:22,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1701572225, now seen corresponding path program 10 times [2022-11-03 01:46:22,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:46:22,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551427581] [2022-11-03 01:46:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:22,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:46:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:47:01,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551427581] [2022-11-03 01:47:01,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551427581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471615054] [2022-11-03 01:47:01,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:47:01,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:01,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:01,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:01,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:47:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 4858 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-03 01:47:03,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:47:03,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:47:58,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471615054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:58,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370899949] [2022-11-03 01:47:58,557 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:47:58,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:47:58,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:47:58,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:47:58,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:47:58,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:58,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,378 INFO L356 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-03 01:47:59,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-03 01:47:59,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-03 01:47:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:47:59,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:59,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:59,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:59,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:00,037 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:48:00,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-03 01:48:01,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,498 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:48:01,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:48:01,533 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:48:01,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:48:01,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,637 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:48:01,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:48:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,716 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:01,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:01,747 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:48:01,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:48:01,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,825 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:48:01,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 131 [2022-11-03 01:48:01,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,915 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:01,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:01,945 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:48:01,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:48:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:01,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,030 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:48:02,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:48:02,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,146 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:02,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:02,185 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:48:02,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:48:02,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,321 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:48:02,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:48:02,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,402 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:02,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:02,434 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:48:02,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:48:02,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,542 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:48:02,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 141 [2022-11-03 01:48:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,628 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:02,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:02,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,662 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:02,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,733 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:48:02,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:48:02,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,794 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:02,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:02,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,822 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:02,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:02,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:02,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,882 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:48:02,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:48:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:02,962 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:02,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:03,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:03,017 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:03,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:03,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:03,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:03,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:03,078 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:48:03,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-03 01:48:03,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:03,133 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:03,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:48:03,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:48:12,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15779#(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~mem21#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~mem22#1| |ULTIMATE.start_main_#t~mem21#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_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 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 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:48:12,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:48:12,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:48:12,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-03 01:48:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506798769] [2022-11-03 01:48:12,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:12,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-03 01:48:12,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-03 01:48:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-03 01:48:12,524 INFO L87 Difference]: Start difference. First operand 391 states and 400 transitions. Second operand has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 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) [2022-11-03 01:48:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:16,099 INFO L93 Difference]: Finished difference Result 782 states and 1001 transitions. [2022-11-03 01:48:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-03 01:48:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 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 389 [2022-11-03 01:48:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:16,103 INFO L225 Difference]: With dead ends: 782 [2022-11-03 01:48:16,104 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 01:48:16,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 936 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 81.4s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-03 01:48:16,114 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:16,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:48:16,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 01:48:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-11-03 01:48:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.0168918918918919) internal successors, (602), 592 states have internal predecessors, (602), 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) [2022-11-03 01:48:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 602 transitions. [2022-11-03 01:48:16,143 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 602 transitions. Word has length 389 [2022-11-03 01:48:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:16,144 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 602 transitions. [2022-11-03 01:48:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 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) [2022-11-03 01:48:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 602 transitions. [2022-11-03 01:48:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-11-03 01:48:16,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:16,151 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:16,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 01:48:16,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:48:16,360 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:16,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash 392776703, now seen corresponding path program 11 times [2022-11-03 01:48:16,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:16,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536490037] [2022-11-03 01:48:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:16,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 83027 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:50:33,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536490037] [2022-11-03 01:50:33,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536490037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344666432] [2022-11-03 01:50:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:50:33,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:33,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:33,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c704afb-8b49-4b43-b6c1-394b0ef15e8e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process