./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/copysome2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW --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 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 --- 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-4e7fbc6 [2022-11-23 13:45:09,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:45:09,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:45:09,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:45:09,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:45:09,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:45:09,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:45:09,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:45:09,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:45:09,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:45:09,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:45:09,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:45:09,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:45:09,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:45:09,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:45:09,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:45:09,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:45:09,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:45:09,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:45:09,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:45:09,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:45:09,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:45:09,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:45:09,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:45:09,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:45:09,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:45:09,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:45:09,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:45:09,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:45:09,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:45:09,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:45:09,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:45:09,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:45:09,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:45:09,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:45:09,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:45:09,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:45:09,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:45:09,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:45:09,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:45:09,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:45:09,439 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:45:09,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:45:09,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:45:09,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:45:09,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:45:09,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:45:09,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:45:09,481 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:45:09,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:45:09,481 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:45:09,482 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:45:09,483 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:45:09,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:45:09,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:45:09,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:45:09,483 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:45:09,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:45:09,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:45:09,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:45:09,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:45:09,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:45:09,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:45:09,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:45:09,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:45:09,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:45:09,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:45:09,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:45:09,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:45:09,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:45:09,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:45:09,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:45:09,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:45:09,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:45:09,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:45:09,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:45:09,488 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:45:09,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:45:09,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:45:09,498 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:45:09,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:45:09,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:45:09,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:45:09,499 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_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 [2022-11-23 13:45:09,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:45:09,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:45:09,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:45:09,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:45:09,819 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:45:09,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-programs/copysome2-2.i [2022-11-23 13:45:12,922 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:45:13,106 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:45:13,107 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/sv-benchmarks/c/array-programs/copysome2-2.i [2022-11-23 13:45:13,114 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/data/23310c2e9/7d70ba1c135d479d81ded31a39b8c4a0/FLAG806159bcd [2022-11-23 13:45:13,136 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/data/23310c2e9/7d70ba1c135d479d81ded31a39b8c4a0 [2022-11-23 13:45:13,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:45:13,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:45:13,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:45:13,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:45:13,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:45:13,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4feaa0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13, skipping insertion in model container [2022-11-23 13:45:13,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:45:13,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:45:13,374 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2022-11-23 13:45:13,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:45:13,408 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:45:13,425 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2022-11-23 13:45:13,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:45:13,465 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:45:13,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13 WrapperNode [2022-11-23 13:45:13,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:45:13,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:45:13,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:45:13,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:45:13,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,521 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-11-23 13:45:13,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:45:13,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:45:13,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:45:13,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:45:13,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:45:13,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:45:13,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:45:13,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:45:13,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (1/1) ... [2022-11-23 13:45:13,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:45:13,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:45:13,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:45:13,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:45:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:45:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:45:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:45:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:45:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:45:13,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:45:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:45:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:45:13,743 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:45:13,745 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:45:13,919 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:45:13,977 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:45:13,977 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 13:45:13,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:45:13 BoogieIcfgContainer [2022-11-23 13:45:13,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:45:13,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:45:13,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:45:13,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:45:13,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:45:13" (1/3) ... [2022-11-23 13:45:13,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ecdf4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:45:13, skipping insertion in model container [2022-11-23 13:45:13,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:45:13" (2/3) ... [2022-11-23 13:45:13,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ecdf4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:45:13, skipping insertion in model container [2022-11-23 13:45:13,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:45:13" (3/3) ... [2022-11-23 13:45:13,989 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2022-11-23 13:45:14,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:45:14,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:45:14,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:45:14,131 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;@53efbef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:45:14,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:45:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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) [2022-11-23 13:45:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 13:45:14,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:14,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:45:14,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:45:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash 904902092, now seen corresponding path program 1 times [2022-11-23 13:45:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551517911] [2022-11-23 13:45:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:14,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:45:14,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551517911] [2022-11-23 13:45:14,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551517911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:45:14,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:45:14,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:45:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426952076] [2022-11-23 13:45:14,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:45:14,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:45:14,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:45:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:45:14,538 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:45:14,624 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-23 13:45:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:45:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-23 13:45:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:45:14,657 INFO L225 Difference]: With dead ends: 21 [2022-11-23 13:45:14,657 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 13:45:14,660 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 [2022-11-23 13:45:14,664 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:45:14,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:45:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 13:45:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 13:45:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-23 13:45:14,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2022-11-23 13:45:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:14,712 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-23 13:45:14,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-23 13:45:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 13:45:14,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:14,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:45:14,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:45:14,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:45:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:14,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1842715167, now seen corresponding path program 1 times [2022-11-23 13:45:14,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:14,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519255446] [2022-11-23 13:45:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:14,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:45:14,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:14,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519255446] [2022-11-23 13:45:14,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519255446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:45:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955618569] [2022-11-23 13:45:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:45:14,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:45:14,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:45:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:45:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:45:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:45:15,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:45:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:45:15,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955618569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:45:15,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1404007233] [2022-11-23 13:45:15,133 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 13:45:15,134 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:45:15,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:45:15,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:45:15,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:45:15,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,373 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-23 13:45:15,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-23 13:45:15,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-23 13:45:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-23 13:45:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:15,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:15,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:15,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:15,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:16,071 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-11-23 13:45:16,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-11-23 13:45:17,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:17,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:17,125 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-23 13:45:17,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-23 13:45:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:17,186 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:17,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:17,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:17,239 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:17,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:17,284 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:45:17,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 13:45:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:17,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:17,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:17,570 INFO L321 Elim1Store]: treesize reduction 231, result has 34.6 percent of original size [2022-11-23 13:45:17,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 228 [2022-11-23 13:45:17,914 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-11-23 13:45:17,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1161 treesize of output 1119 [2022-11-23 13:45:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:17,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1096 treesize of output 1029 [2022-11-23 13:45:18,536 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:19,514 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 13:45:19,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-11-23 13:45:19,545 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:19,895 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:19,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:19,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 13:45:19,945 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:19,970 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:20,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:20,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2022-11-23 13:45:20,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:20,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 13:45:20,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2022-11-23 13:45:20,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-23 13:45:20,356 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:20,384 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:20,511 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:20,543 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:20,577 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:21,228 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:21,238 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:21,253 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:21,274 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:21,285 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:21,295 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:22,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 54 [2022-11-23 13:45:22,164 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,203 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,263 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,284 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,317 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:22,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-11-23 13:45:22,433 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,457 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,490 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:22,532 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:24,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:24,589 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:24,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:24,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:24,609 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:24,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:24,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:45:24,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 13:45:24,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:45:24,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:45:24,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 13:45:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776087252] [2022-11-23 13:45:24,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:45:24,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:45:24,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:45:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:45:24,835 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:45:24,923 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2022-11-23 13:45:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:45:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 13:45:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:45:24,924 INFO L225 Difference]: With dead ends: 30 [2022-11-23 13:45:24,925 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 13:45:24,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:45:24,926 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:45:24,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:45:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 13:45:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 13:45:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-23 13:45:24,932 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2022-11-23 13:45:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:24,932 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-23 13:45:24,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-23 13:45:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 13:45:24,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:24,933 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:45:24,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 13:45:25,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:25,139 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:45:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1262196212, now seen corresponding path program 2 times [2022-11-23 13:45:25,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:25,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976947941] [2022-11-23 13:45:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:25,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:45:25,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:25,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976947941] [2022-11-23 13:45:25,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976947941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:45:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240796300] [2022-11-23 13:45:25,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:45:25,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:25,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:45:25,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:45:25,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:45:25,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:45:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:45:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:45:25,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:45:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:45:25,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:45:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:45:25,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240796300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:45:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618044505] [2022-11-23 13:45:25,739 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 13:45:25,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:45:25,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:45:25,740 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:45:25,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:45:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,819 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-23 13:45:25,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-23 13:45:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,923 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-23 13:45:25,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-23 13:45:25,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:25,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-23 13:45:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:26,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:26,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:26,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:26,270 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-11-23 13:45:26,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-11-23 13:45:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,058 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-23 13:45:27,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-23 13:45:27,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,097 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:27,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:27,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,140 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:27,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:27,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,178 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:27,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:27,184 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:27,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:27,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,257 INFO L321 Elim1Store]: treesize reduction 116, result has 22.1 percent of original size [2022-11-23 13:45:27,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 193 [2022-11-23 13:45:27,431 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-11-23 13:45:27,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 170 treesize of output 184 [2022-11-23 13:45:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:27,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 122 [2022-11-23 13:45:27,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:27,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:27,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 110 [2022-11-23 13:45:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,568 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:27,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:27,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:27,587 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:27,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:27,604 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:45:27,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 13:45:27,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:45:27,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:45:27,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 13:45:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481653381] [2022-11-23 13:45:27,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:45:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 13:45:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 13:45:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:45:27,848 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:45:27,961 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-23 13:45:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 13:45:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 13:45:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:45:27,962 INFO L225 Difference]: With dead ends: 54 [2022-11-23 13:45:27,962 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 13:45:27,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:45:27,963 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:45:27,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:45:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 13:45:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 13:45:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-23 13:45:27,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2022-11-23 13:45:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:27,976 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-23 13:45:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-23 13:45:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 13:45:27,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:27,979 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:45:27,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:45:28,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:28,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:45:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1863011220, now seen corresponding path program 3 times [2022-11-23 13:45:28,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:28,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884994136] [2022-11-23 13:45:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 13:45:28,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884994136] [2022-11-23 13:45:28,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884994136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:45:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289308971] [2022-11-23 13:45:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:45:28,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:45:28,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:45:28,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:45:29,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:45:29,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:45:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:45:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:45:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 13:45:29,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:45:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 13:45:29,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289308971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:45:29,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959184448] [2022-11-23 13:45:29,298 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 13:45:29,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:45:29,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:45:29,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:45:29,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:45:29,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,383 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-23 13:45:29,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-23 13:45:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,492 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-23 13:45:29,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-23 13:45:29,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-11-23 13:45:29,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:29,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,738 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-11-23 13:45:29,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-11-23 13:45:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,863 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-23 13:45:29,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-23 13:45:29,899 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:45:29,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 13:45:29,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:29,992 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 13:45:29,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-23 13:45:30,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,062 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:30,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:30,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,101 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:30,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:30,107 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 13:45:30,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,195 INFO L321 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2022-11-23 13:45:30,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 197 [2022-11-23 13:45:30,277 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-23 13:45:30,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 171 [2022-11-23 13:45:30,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 109 [2022-11-23 13:45:30,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2022-11-23 13:45:30,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,470 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:30,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,490 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:30,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:30,504 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:45:30,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 13:45:30,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:45:30,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:45:30,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 13:45:30,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206852557] [2022-11-23 13:45:30,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:45:30,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 13:45:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 13:45:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 13:45:30,695 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2022-11-23 13:45:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:45:30,950 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2022-11-23 13:45:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 13:45:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 37 [2022-11-23 13:45:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:45:30,952 INFO L225 Difference]: With dead ends: 102 [2022-11-23 13:45:30,952 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 13:45:30,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 13:45:30,953 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:45:30,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:45:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 13:45:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-23 13:45:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 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) [2022-11-23 13:45:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-23 13:45:30,964 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 37 [2022-11-23 13:45:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:30,965 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-23 13:45:30,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2022-11-23 13:45:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-23 13:45:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 13:45:30,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:30,967 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:45:30,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:45:31,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:31,174 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:45:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash -60677844, now seen corresponding path program 4 times [2022-11-23 13:45:31,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:31,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645103307] [2022-11-23 13:45:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:31,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 13:45:32,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:32,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645103307] [2022-11-23 13:45:32,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645103307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:45:32,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829621492] [2022-11-23 13:45:32,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:45:32,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:32,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:45:32,842 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:45:32,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:45:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 13:45:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:45:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 13:45:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:45:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 13:45:34,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829621492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:45:34,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719179796] [2022-11-23 13:45:34,176 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 13:45:34,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:45:34,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:45:34,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:45:34,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:45:34,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,262 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-23 13:45:34,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-23 13:45:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,351 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-23 13:45:34,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-23 13:45:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-11-23 13:45:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,595 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-11-23 13:45:34,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-11-23 13:45:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,716 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-23 13:45:34,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-23 13:45:34,748 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:45:34,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 13:45:34,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,859 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 13:45:34,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-23 13:45:34,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:34,940 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:34,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:34,964 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:45:34,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 13:45:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:35,114 INFO L321 Elim1Store]: treesize reduction 261, result has 26.1 percent of original size [2022-11-23 13:45:35,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 198 [2022-11-23 13:45:35,243 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-23 13:45:35,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 338 [2022-11-23 13:45:35,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:45:35,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 298 [2022-11-23 13:45:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:35,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:35,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 602 treesize of output 546 [2022-11-23 13:45:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:36,467 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:36,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:36,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:36,487 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:45:36,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 13:45:36,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:45:36,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 13:45:36,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:45:36,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:45:36,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-23 13:45:36,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418484619] [2022-11-23 13:45:36,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:45:36,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 13:45:36,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 13:45:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 13:45:36,811 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:45:37,437 INFO L93 Difference]: Finished difference Result 198 states and 275 transitions. [2022-11-23 13:45:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 13:45:37,438 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-23 13:45:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:45:37,440 INFO L225 Difference]: With dead ends: 198 [2022-11-23 13:45:37,440 INFO L226 Difference]: Without dead ends: 147 [2022-11-23 13:45:37,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 13:45:37,442 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:45:37,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:45:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-23 13:45:37,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-23 13:45:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-11-23 13:45:37,460 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 73 [2022-11-23 13:45:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:37,460 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-11-23 13:45:37,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:45:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-11-23 13:45:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 13:45:37,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:37,465 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:45:37,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:45:37,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:37,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:45:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:37,673 INFO L85 PathProgramCache]: Analyzing trace with hash -186099028, now seen corresponding path program 5 times [2022-11-23 13:45:37,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:37,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618169284] [2022-11-23 13:45:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:37,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-23 13:45:42,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618169284] [2022-11-23 13:45:42,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618169284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:45:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787523581] [2022-11-23 13:45:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:45:42,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:42,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:45:42,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:45:42,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd5ed03-7444-48c8-be99-24c04d11ce2a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process