./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh --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 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a --- 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-2329fc7 [2022-12-14 08:36:41,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:36:41,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:36:41,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:36:41,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:36:41,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:36:41,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:36:41,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:36:41,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:36:41,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:36:41,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:36:41,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:36:41,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:36:41,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:36:41,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:36:41,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:36:41,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:36:41,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:36:41,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:36:41,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:36:41,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:36:41,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:36:41,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:36:41,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:36:41,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:36:41,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:36:41,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:36:41,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:36:41,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:36:41,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:36:41,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:36:41,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:36:41,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:36:41,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:36:41,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:36:41,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:36:41,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:36:41,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:36:41,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:36:41,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:36:41,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:36:41,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:36:41,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:36:41,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:36:41,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:36:41,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:36:41,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:36:41,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:36:41,481 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:36:41,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:36:41,482 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:36:41,482 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:36:41,482 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:36:41,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:36:41,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:36:41,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:36:41,483 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:36:41,483 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:36:41,483 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:36:41,483 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:36:41,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:36:41,484 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:36:41,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:36:41,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:36:41,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:36:41,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:36:41,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:36:41,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:36:41,485 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:36:41,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:36:41,485 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:36:41,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:36:41,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:36:41,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:36:41,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:36:41,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:36:41,486 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:36:41,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:36:41,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:36:41,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:36:41,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:36:41,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:36:41,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:36:41,487 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_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a [2022-12-14 08:36:41,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:36:41,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:36:41,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:36:41,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:36:41,683 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:36:41,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2022-12-14 08:36:44,227 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:36:44,383 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:36:44,383 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2022-12-14 08:36:44,387 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/data/dbdcdea84/8fd8c40a784348c0b34213a802bb3678/FLAG2c327259b [2022-12-14 08:36:44,796 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/data/dbdcdea84/8fd8c40a784348c0b34213a802bb3678 [2022-12-14 08:36:44,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:36:44,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:36:44,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:36:44,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:36:44,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:36:44,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9f8cf2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44, skipping insertion in model container [2022-12-14 08:36:44,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:36:44,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:36:44,938 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_a472eaca-da05-4d18-bc15-c7635f3ca6b3/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2022-12-14 08:36:44,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:36:44,963 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:36:44,975 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_a472eaca-da05-4d18-bc15-c7635f3ca6b3/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2022-12-14 08:36:44,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:36:44,994 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:36:44,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44 WrapperNode [2022-12-14 08:36:44,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:36:44,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:36:44,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:36:44,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:36:45,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,020 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-12-14 08:36:45,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:36:45,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:36:45,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:36:45,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:36:45,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:36:45,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:36:45,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:36:45,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:36:45,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:45,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:36:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:45,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:36:45,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:36:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:36:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 08:36:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 08:36:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:36:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:36:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:36:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 08:36:45,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 08:36:45,161 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:36:45,163 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:36:45,265 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:36:45,287 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:36:45,288 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:36:45,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:36:45 BoogieIcfgContainer [2022-12-14 08:36:45,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:36:45,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:36:45,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:36:45,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:36:45,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:36:44" (1/3) ... [2022-12-14 08:36:45,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20782625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:36:45, skipping insertion in model container [2022-12-14 08:36:45,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (2/3) ... [2022-12-14 08:36:45,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20782625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:36:45, skipping insertion in model container [2022-12-14 08:36:45,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:36:45" (3/3) ... [2022-12-14 08:36:45,298 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound1.c [2022-12-14 08:36:45,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:36:45,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:36:45,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:36:45,355 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;@610cf5c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:36:45,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:36:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 08:36:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 08:36:45,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:45,364 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:45,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash 263857554, now seen corresponding path program 1 times [2022-12-14 08:36:45,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:45,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937549523] [2022-12-14 08:36:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:45,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:45,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937549523] [2022-12-14 08:36:45,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 08:36:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386150560] [2022-12-14 08:36:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:45,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:45,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:45,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:36:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 08:36:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:36:45,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:36:45,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386150560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:45,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:36:45,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:36:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693693283] [2022-12-14 08:36:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:36:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:45,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:36:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:36:45,595 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:36:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:45,618 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2022-12-14 08:36:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:36:45,621 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-12-14 08:36:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:45,628 INFO L225 Difference]: With dead ends: 34 [2022-12-14 08:36:45,628 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 08:36:45,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:36:45,634 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:45,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:36:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 08:36:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 08:36:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 08:36:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-12-14 08:36:45,665 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 19 [2022-12-14 08:36:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:45,666 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-12-14 08:36:45,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:36:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-12-14 08:36:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:36:45,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:45,668 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:45,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:36:45,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 08:36:45,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -999917202, now seen corresponding path program 1 times [2022-12-14 08:36:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:45,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941571112] [2022-12-14 08:36:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:45,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:45,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383865255] [2022-12-14 08:36:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:45,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:45,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:36:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 08:36:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:36:46,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:36:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:36:46,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941571112] [2022-12-14 08:36:46,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:36:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383865255] [2022-12-14 08:36:46,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383865255] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:36:46,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:36:46,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-12-14 08:36:46,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561706874] [2022-12-14 08:36:46,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:46,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:36:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:46,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:36:46,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:36:46,492 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:36:48,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:36:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:48,574 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2022-12-14 08:36:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:36:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-12-14 08:36:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:48,576 INFO L225 Difference]: With dead ends: 30 [2022-12-14 08:36:48,576 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 08:36:48,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:36:48,578 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:48,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 08:36:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 08:36:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 08:36:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 08:36:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-14 08:36:48,587 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2022-12-14 08:36:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:48,587 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-14 08:36:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:36:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-14 08:36:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:36:48,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:48,589 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:48,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:36:48,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:48,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:48,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1224321740, now seen corresponding path program 1 times [2022-12-14 08:36:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:48,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318600823] [2022-12-14 08:36:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:48,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:48,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:48,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955342034] [2022-12-14 08:36:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:48,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:48,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:36:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:36:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:36:48,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:36:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:36:48,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318600823] [2022-12-14 08:36:48,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:36:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955342034] [2022-12-14 08:36:48,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955342034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:36:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2110391948] [2022-12-14 08:36:48,988 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 08:36:48,988 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:36:48,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:36:48,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:36:48,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:36:49,434 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2022-12-14 08:36:49,446 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2022-12-14 08:36:49,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:36:50,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2110391948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:50,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:36:50,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 5] total 17 [2022-12-14 08:36:50,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287433300] [2022-12-14 08:36:50,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 08:36:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 08:36:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:36:50,278 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 08:36:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:50,752 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-12-14 08:36:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:36:50,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2022-12-14 08:36:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:50,753 INFO L225 Difference]: With dead ends: 34 [2022-12-14 08:36:50,753 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 08:36:50,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-12-14 08:36:50,754 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:50,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:36:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 08:36:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2022-12-14 08:36:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 08:36:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 08:36:50,761 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-12-14 08:36:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:50,761 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 08:36:50,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 08:36:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 08:36:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:36:50,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:50,762 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:50,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 08:36:50,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:50,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1222534280, now seen corresponding path program 1 times [2022-12-14 08:36:50,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:50,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183565408] [2022-12-14 08:36:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:50,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:50,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:50,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084514812] [2022-12-14 08:36:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:50,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:50,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:50,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a472eaca-da05-4d18-bc15-c7635f3ca6b3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process