./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8d7ac4e991594d98a551c4a6bcf4f5a84930a621689511bd6ecf242e7dc37495 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:54:21,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:54:21,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:54:21,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:54:21,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:54:21,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:54:21,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:54:21,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:54:21,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:54:21,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:54:21,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:54:21,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:54:21,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:54:21,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:54:21,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:54:21,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:54:21,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:54:21,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:54:21,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:54:21,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:54:21,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:54:21,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:54:21,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:54:21,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:54:21,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:54:21,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:54:21,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:54:21,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:54:21,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:54:21,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:54:21,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:54:21,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:54:21,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:54:21,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:54:21,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:54:21,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:54:21,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:54:21,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:54:21,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:54:21,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:54:21,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:54:21,638 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:54:21,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:54:21,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:54:21,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:54:21,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:54:21,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:54:21,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:54:21,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:54:21,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:54:21,667 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:54:21,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:54:21,668 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:54:21,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:54:21,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:54:21,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:54:21,669 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:54:21,669 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:54:21,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:54:21,670 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:54:21,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:54:21,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:54:21,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:54:21,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:54:21,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:54:21,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:54:21,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:54:21,673 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:54:21,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:54:21,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:54:21,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:54:21,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:54:21,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:54:21,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:54:21,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:54:21,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:54:21,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:54:21,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:54:21,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:54:21,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:54:21,676 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_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7ac4e991594d98a551c4a6bcf4f5a84930a621689511bd6ecf242e7dc37495 [2022-11-03 03:54:21,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:54:21,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:54:21,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:54:21,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:54:22,002 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:54:22,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c [2022-11-03 03:54:22,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/data/14be263be/15def44f309a4648926cffafc28a98a0/FLAG0601f6794 [2022-11-03 03:54:22,865 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:54:22,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c [2022-11-03 03:54:22,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/data/14be263be/15def44f309a4648926cffafc28a98a0/FLAG0601f6794 [2022-11-03 03:54:23,037 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/data/14be263be/15def44f309a4648926cffafc28a98a0 [2022-11-03 03:54:23,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:54:23,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:54:23,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:54:23,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:54:23,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:54:23,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:23,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62618e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23, skipping insertion in model container [2022-11-03 03:54:23,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:23,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:54:23,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:54:23,375 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c[1107,1120] [2022-11-03 03:54:23,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:54:23,720 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:54:23,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c[1107,1120] [2022-11-03 03:54:23,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:54:23,920 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:54:23,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23 WrapperNode [2022-11-03 03:54:23,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:54:23,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:54:23,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:54:23,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:54:23,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:23,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,166 INFO L138 Inliner]: procedures = 15, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1069 [2022-11-03 03:54:24,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:54:24,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:54:24,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:54:24,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:54:24,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:54:24,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:54:24,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:54:24,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:54:24,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (1/1) ... [2022-11-03 03:54:24,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:54:24,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:24,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:54:24,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:54:24,513 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:54:24,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:54:24,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:54:24,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:54:24,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:54:24,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:54:24,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:54:24,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:54:24,907 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:54:24,911 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:54:27,372 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:54:28,562 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:54:28,563 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-03 03:54:28,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:54:28 BoogieIcfgContainer [2022-11-03 03:54:28,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:54:28,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:54:28,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:54:28,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:54:28,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:54:23" (1/3) ... [2022-11-03 03:54:28,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381c44de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:54:28, skipping insertion in model container [2022-11-03 03:54:28,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:23" (2/3) ... [2022-11-03 03:54:28,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381c44de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:54:28, skipping insertion in model container [2022-11-03 03:54:28,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:54:28" (3/3) ... [2022-11-03 03:54:28,577 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c [2022-11-03 03:54:28,601 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:54:28,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:54:28,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:54:28,669 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;@7b7d7cc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:54:28,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:54:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 03:54:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:54:28,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:28,693 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:28,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:28,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2074452761, now seen corresponding path program 1 times [2022-11-03 03:54:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:28,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421001313] [2022-11-03 03:54:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:28,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:54:30,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421001313] [2022-11-03 03:54:30,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421001313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:30,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:30,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:54:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782554363] [2022-11-03 03:54:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:30,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:54:30,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:54:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:54:30,109 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 03:54:33,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:33,346 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2022-11-03 03:54:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:54:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 26 [2022-11-03 03:54:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:33,368 INFO L225 Difference]: With dead ends: 48 [2022-11-03 03:54:33,369 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 03:54:33,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:54:33,382 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:33,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 03:54:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 03:54:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-03 03:54:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 03:54:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-03 03:54:33,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 26 [2022-11-03 03:54:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:33,451 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-03 03:54:33,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 03:54:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-03 03:54:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:54:33,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:33,455 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:54:33,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:33,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1009775887, now seen corresponding path program 1 times [2022-11-03 03:54:33,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:33,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125324838] [2022-11-03 03:54:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:33,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:54:34,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125324838] [2022-11-03 03:54:34,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125324838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:34,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666949204] [2022-11-03 03:54:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:34,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:34,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:34,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:54:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:54:35,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:54:35,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:35,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666949204] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:35,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:54:35,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-03 03:54:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361219215] [2022-11-03 03:54:35,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:35,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:54:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:54:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:54:35,189 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 03:54:37,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:38,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:38,978 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-11-03 03:54:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:54:38,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 27 [2022-11-03 03:54:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:38,980 INFO L225 Difference]: With dead ends: 47 [2022-11-03 03:54:38,981 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 03:54:38,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:54:38,983 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:38,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 03:54:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 03:54:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-03 03:54:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 03:54:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-11-03 03:54:38,990 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 27 [2022-11-03 03:54:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:38,991 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-11-03 03:54:38,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 03:54:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-11-03 03:54:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:54:38,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:38,993 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:39,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:54:39,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:39,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:39,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1169147547, now seen corresponding path program 1 times [2022-11-03 03:54:39,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:39,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564160969] [2022-11-03 03:54:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:39,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:40,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564160969] [2022-11-03 03:54:40,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564160969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:40,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935908670] [2022-11-03 03:54:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:40,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:40,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:40,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:54:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:41,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:54:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:41,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:41,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935908670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851801419] [2022-11-03 03:54:41,717 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 03:54:41,717 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:54:41,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:54:41,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:54:41,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:54:41,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 17 treesize of output 17 [2022-11-03 03:54:41,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:54:41,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2022-11-03 03:54:42,253 INFO L356 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2022-11-03 03:54:42,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 390 treesize of output 397 [2022-11-03 03:54:42,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2022-11-03 03:54:42,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:54:42,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:54:43,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2022-11-03 03:54:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:43,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 170 [2022-11-03 03:54:43,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2022-11-03 03:54:48,402 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-03 03:54:48,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:54:58,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590#(and (<= 0 |ULTIMATE.start_main_~var_99~0#1|) (<= 1 |ULTIMATE.start_main_~init_110_arg_1~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_40~0#1| 127) (<= 2 |ULTIMATE.start_main_~msb_SORT_5~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_36~0#1| 31) (<= |ULTIMATE.start_main_~msb_SORT_5~0#1| 2) (<= 0 |ULTIMATE.start_main_~var_23~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_3~0#1| 32768) (<= |ULTIMATE.start_main_~var_100_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_111_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_104~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_107~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~var_79~0#1| 1) (<= 31 |ULTIMATE.start_main_~mask_SORT_36~0#1|) (<= |ULTIMATE.start_main_~var_118_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_57~0#1|) (<= |ULTIMATE.start_main_~var_107~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_142_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_52~0#1|) (<= |ULTIMATE.start_main_~var_50_arg_0~0#1.offset| 0) (<= |ULTIMATE.start_main_~msb_SORT_11~0#1| 128) (<= |ULTIMATE.start_main_~var_108~0#1| 0) (<= |ULTIMATE.start_main_~var_228~0#1| 2) (<= |ULTIMATE.start_main_~var_140_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_105_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_181~0#1| 0) (<= 0 |ULTIMATE.start_main_~var_75~0#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~var_99~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_21_arg_0~0#1.base|) (<= |ULTIMATE.start_main_~msb_SORT_227~0#1| 2147483648) (<= |ULTIMATE.start_main_~#state_14~0#1.offset| 0) (<= |ULTIMATE.start_main_~var_142_arg_0~0#1| 1) (<= 16 |ULTIMATE.start_main_~msb_SORT_36~0#1|) (<= 0 |ULTIMATE.start_main_~var_88~0#1|) (<= |ULTIMATE.start_main_~var_105_arg_1~0#1| 1) (<= |ULTIMATE.start_main_~var_115_arg_0~0#1| 1) (<= 128 |ULTIMATE.start_main_~msb_SORT_11~0#1|) (<= |ULTIMATE.start_main_~var_76_arg_1~0#1| 1) (<= |ULTIMATE.start_main_~var_57~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_140_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_89_arg_1~0#1|) (<= 4 |ULTIMATE.start_main_~msb_SORT_12~0#1|) (<= |ULTIMATE.start_main_~var_98_arg_1~0#1| 0) (<= |ULTIMATE.start_main_~var_137_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_30_arg_1~0#1|) (<= |ULTIMATE.start_main_~#state_44~0#1.offset| 0) (<= 127 |ULTIMATE.start_main_~mask_SORT_40~0#1|) (<= 1 |ULTIMATE.start_main_~var_130_arg_0~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_227~0#1| 1) 0) (<= |ULTIMATE.start_main_~var_58_arg_1~0#1| 1) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~var_111_arg_2~0#1| 1) (<= |ULTIMATE.start_main_~var_29~0#1| 1) (<= |ULTIMATE.start_main_~var_80_arg_1~0#1| 1) (<= 32 |ULTIMATE.start_main_~msb_SORT_38~0#1|) (<= |ULTIMATE.start_main_~var_141_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~#state_14~0#1.base|) (<= 64 |ULTIMATE.start_main_~msb_SORT_40~0#1|) (<= |ULTIMATE.start_main_~state_109~0#1| 1) (<= 2 |ULTIMATE.start_main_~var_228~0#1|) (<= 8 |ULTIMATE.start_main_~var_27~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_12~0#1| 4) (<= |ULTIMATE.start_main_~var_75~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_124_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_76_arg_1~0#1|) (<= 0 |ULTIMATE.start_main_~var_181~0#1|) (<= 1 |ULTIMATE.start_main_~mask_SORT_1~0#1|) (<= 15 |ULTIMATE.start_main_~mask_SORT_15~0#1|) (<= |ULTIMATE.start_main_~var_89_arg_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_140~0#1|) (<= |ULTIMATE.start_main_~var_80_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~init_110_arg_1~0#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_40~0#1| 64) (<= |ULTIMATE.start_main_~var_27~0#1| 8) (<= 0 |ULTIMATE.start_main_~var_29~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_5~0#1| 3) (<= |ULTIMATE.start_main_~mask_SORT_15~0#1| 15) (<= |ULTIMATE.start_main_~var_97~0#1| 0) (<= |ULTIMATE.start_main_~mask_SORT_38~0#1| 63) (<= 1 |ULTIMATE.start_main_~var_141_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_100_arg_0~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_38~0#1| 32) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_227~0#1| 1)) (<= |ULTIMATE.start_main_~var_24_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_104~0#1|) (<= 0 |ULTIMATE.start_main_~var_24_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~var_30_arg_1~0#1| 1) (<= 63 |ULTIMATE.start_main_~mask_SORT_38~0#1|) (<= 0 |ULTIMATE.start_main_~var_76_arg_0~0#1|) (<= 7 |ULTIMATE.start_main_~mask_SORT_12~0#1|) (<= 0 |ULTIMATE.start_main_~var_80_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_111_arg_1~0#1| 0) (<= |ULTIMATE.start_main_~var_124_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_98_arg_1~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_36~0#1| 16) (<= 255 |ULTIMATE.start_main_~mask_SORT_11~0#1|) (<= 2147483648 |ULTIMATE.start_main_~msb_SORT_227~0#1|) (<= 255 |ULTIMATE.start_main_~var_408~0#1|) (<= |ULTIMATE.start_main_~var_23~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_50_arg_0~0#1.offset|) (<= |ULTIMATE.start_main_~var_130_arg_0~0#1| 1) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~var_80_arg_0~0#1|) (<= |ULTIMATE.start_main_~var_21_arg_0~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~state_109~0#1|) (<= |ULTIMATE.start_main_~var_140~0#1| 1) (<= |ULTIMATE.start_main_~var_121_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_52~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_111_arg_1~0#1|) (<= 0 |ULTIMATE.start_main_~var_115_arg_0~0#1|) (<= 1 |ULTIMATE.start_main_~var_111_arg_0~0#1|) (<= 65535 |ULTIMATE.start_main_~mask_SORT_3~0#1|) (<= 0 |ULTIMATE.start_main_~var_97~0#1|) (<= 1 |ULTIMATE.start_main_~msb_SORT_1~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_11~0#1| 255) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~var_50_arg_0~0#1.base|) (<= 1 |ULTIMATE.start_main_~var_137_arg_0~0#1|) (<= 1 |ULTIMATE.start_main_~var_118_arg_0~0#1|) (<= 32768 |ULTIMATE.start_main_~msb_SORT_3~0#1|) (<= 0 |ULTIMATE.start_main_~#state_44~0#1.offset|) (<= 3 |ULTIMATE.start_main_~mask_SORT_5~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_15~0#1| 8) (<= 0 |ULTIMATE.start_main_~var_108~0#1|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~var_79~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_1~0#1| 1) (<= |ULTIMATE.start_main_~var_408~0#1| 255) (<= 8 |ULTIMATE.start_main_~msb_SORT_15~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_3~0#1| 65535) (<= 0 |ULTIMATE.start_main_~#state_14~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~var_76_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_58_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_53_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_21_arg_0~0#1.offset|) (<= 0 |ULTIMATE.start_main_~var_121_arg_0~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_1~0#1| 1) (<= |ULTIMATE.start_main_~mask_SORT_12~0#1| 7) (<= 0 |ULTIMATE.start_main_~#state_44~0#1.base|) (<= 0 |ULTIMATE.start_main_~var_53_arg_0~0#1|) (<= |ULTIMATE.start_main_~var_88~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_111_arg_2~0#1|))' at error location [2022-11-03 03:54:58,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:54:58,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:54:58,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 8 [2022-11-03 03:54:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140599073] [2022-11-03 03:54:58,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:58,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:54:58,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:58,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:54:58,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:54:58,262 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 03:55:01,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:55:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:01,173 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-11-03 03:55:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:55:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 28 [2022-11-03 03:55:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:01,175 INFO L225 Difference]: With dead ends: 52 [2022-11-03 03:55:01,175 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 03:55:01,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:55:01,177 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:01,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:55:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 03:55:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 03:55:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 03:55:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-03 03:55:01,184 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 28 [2022-11-03 03:55:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:01,184 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-03 03:55:01,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 03:55:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-03 03:55:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 03:55:01,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:01,186 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:55:01,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:01,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:01,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash 103595379, now seen corresponding path program 2 times [2022-11-03 03:55:01,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:55:01,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414520440] [2022-11-03 03:55:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:01,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:55:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:55:02,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:55:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414520440] [2022-11-03 03:55:02,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414520440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:55:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071715867] [2022-11-03 03:55:02,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:55:02,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:02,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:02,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:02,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e06533a4-2531-4019-ae91-540f51c7f37b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:55:04,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 03:55:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:04,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:55:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates...