./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur --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 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 --- 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-38b53e6 [2022-11-26 01:09:54,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:09:54,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:09:54,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:09:54,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:09:54,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:09:54,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:09:54,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:09:54,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:09:54,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:09:54,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:09:54,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:09:54,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:09:54,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:09:54,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:09:54,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:09:54,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:09:54,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:09:54,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:09:54,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:09:54,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:09:54,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:09:54,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:09:54,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:09:54,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:09:54,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:09:54,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:09:54,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:09:54,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:09:54,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:09:54,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:09:54,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:09:54,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:09:54,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:09:54,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:09:54,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:09:54,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:09:54,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:09:54,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:09:54,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:09:54,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:09:54,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:09:54,597 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:09:54,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:09:54,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:09:54,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:09:54,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:09:54,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:09:54,600 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:09:54,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:09:54,600 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:09:54,600 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:09:54,601 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:09:54,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:09:54,602 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:09:54,602 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:09:54,602 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:09:54,603 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:09:54,603 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:09:54,603 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:09:54,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:09:54,604 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:09:54,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:09:54,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:09:54,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:09:54,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:09:54,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:09:54,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:09:54,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:09:54,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:09:54,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:09:54,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:09:54,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:09:54,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:09:54,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:54,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:09:54,609 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:09:54,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:09:54,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:09:54,609 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:09:54,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:09:54,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:09:54,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:09:54,610 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_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 [2022-11-26 01:09:54,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:09:54,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:09:54,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:09:54,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:09:54,904 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:09:54,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-11-26 01:09:58,001 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:09:58,255 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:09:58,256 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-11-26 01:09:58,263 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/data/6685f35d3/7be0ac9c2e914b1b8605d30bb83eee41/FLAGb0e17fde7 [2022-11-26 01:09:58,278 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/data/6685f35d3/7be0ac9c2e914b1b8605d30bb83eee41 [2022-11-26 01:09:58,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:09:58,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:09:58,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:58,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:09:58,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:09:58,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2951cb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58, skipping insertion in model container [2022-11-26 01:09:58,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:09:58,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:09:58,459 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_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2022-11-26 01:09:58,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:58,488 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:09:58,501 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_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2022-11-26 01:09:58,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:58,523 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:09:58,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58 WrapperNode [2022-11-26 01:09:58,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:58,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:58,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:09:58,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:09:58,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,556 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2022-11-26 01:09:58,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:58,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:09:58,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:09:58,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:09:58,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:09:58,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:09:58,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:09:58,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:09:58,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (1/1) ... [2022-11-26 01:09:58,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:58,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:58,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:09:58,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:09:58,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:09:58,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 01:09:58,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 01:09:58,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:09:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:09:58,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:09:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:09:58,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:09:58,737 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:09:58,739 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:09:58,917 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:09:58,947 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:09:58,947 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 01:09:58,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:58 BoogieIcfgContainer [2022-11-26 01:09:58,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:09:58,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:09:58,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:09:58,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:09:58,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:09:58" (1/3) ... [2022-11-26 01:09:58,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c329d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:58, skipping insertion in model container [2022-11-26 01:09:58,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:58" (2/3) ... [2022-11-26 01:09:58,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c329d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:58, skipping insertion in model container [2022-11-26 01:09:58,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:58" (3/3) ... [2022-11-26 01:09:58,975 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2022-11-26 01:09:59,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:09:59,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:09:59,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:09:59,089 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;@380b7353, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:09:59,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:09:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 01:09:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:09:59,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:59,100 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:59,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1826888722, now seen corresponding path program 1 times [2022-11-26 01:09:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:59,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919449673] [2022-11-26 01:09:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:59,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:59,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919449673] [2022-11-26 01:09:59,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 01:09:59,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333734174] [2022-11-26 01:09:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:59,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:59,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:59,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:59,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:09:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 01:09:59,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:09:59,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:59,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333734174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:59,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:59,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:09:59,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980199818] [2022-11-26 01:09:59,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:59,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 01:09:59,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 01:09:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:09:59,449 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:09:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:59,481 INFO L93 Difference]: Finished difference Result 54 states and 86 transitions. [2022-11-26 01:09:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 01:09:59,483 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-26 01:09:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:59,489 INFO L225 Difference]: With dead ends: 54 [2022-11-26 01:09:59,490 INFO L226 Difference]: Without dead ends: 28 [2022-11-26 01:09:59,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:09:59,496 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:59,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:09:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-26 01:09:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-26 01:09:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 01:09:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-11-26 01:09:59,530 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2022-11-26 01:09:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:59,539 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-11-26 01:09:59,539 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:09:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-11-26 01:09:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 01:09:59,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:59,541 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:59,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:59,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 01:09:59,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash -828509657, now seen corresponding path program 1 times [2022-11-26 01:09:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511438154] [2022-11-26 01:09:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:59,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:59,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:59,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511438154] [2022-11-26 01:09:59,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 01:09:59,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473556822] [2022-11-26 01:09:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:59,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:59,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:59,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:59,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:09:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:59,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:09:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:09:59,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:59,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473556822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:59,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:59,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:09:59,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491354935] [2022-11-26 01:09:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:09:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:09:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:09:59,976 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:00,001 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-11-26 01:10:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:10:00,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-26 01:10:00,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:00,003 INFO L225 Difference]: With dead ends: 37 [2022-11-26 01:10:00,003 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 01:10:00,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:10:00,005 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:00,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:10:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 01:10:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-26 01:10:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 01:10:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-11-26 01:10:00,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 14 [2022-11-26 01:10:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:00,016 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-11-26 01:10:00,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-11-26 01:10:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:10:00,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:00,017 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:00,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 01:10:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:00,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 66369279, now seen corresponding path program 1 times [2022-11-26 01:10:00,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:00,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213477632] [2022-11-26 01:10:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:00,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:00,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178749550] [2022-11-26 01:10:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:00,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:00,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:00,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:10:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:00,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:10:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:10:00,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:00,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:00,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213477632] [2022-11-26 01:10:00,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178749550] [2022-11-26 01:10:00,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178749550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:00,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:00,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:10:00,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434094151] [2022-11-26 01:10:00,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:00,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:10:00,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:10:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:10:00,386 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:00,518 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-11-26 01:10:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:00,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-26 01:10:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:00,524 INFO L225 Difference]: With dead ends: 50 [2022-11-26 01:10:00,524 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 01:10:00,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:00,526 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:00,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 88 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:10:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 01:10:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2022-11-26 01:10:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 01:10:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-11-26 01:10:00,535 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 15 [2022-11-26 01:10:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:00,536 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-11-26 01:10:00,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-11-26 01:10:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 01:10:00,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:00,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:00,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:00,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:00,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1737104877, now seen corresponding path program 1 times [2022-11-26 01:10:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:00,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002685338] [2022-11-26 01:10:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:00,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:00,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:00,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139621122] [2022-11-26 01:10:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:00,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:00,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:00,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:00,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:10:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:10:00,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:10:00,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:00,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002685338] [2022-11-26 01:10:00,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:00,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139621122] [2022-11-26 01:10:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139621122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:00,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:00,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:10:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006025949] [2022-11-26 01:10:00,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:10:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:10:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:10:00,969 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:01,047 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-11-26 01:10:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-26 01:10:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:01,050 INFO L225 Difference]: With dead ends: 55 [2022-11-26 01:10:01,051 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 01:10:01,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:10:01,053 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:01,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:10:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 01:10:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-26 01:10:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 01:10:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-26 01:10:01,075 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2022-11-26 01:10:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:01,076 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-26 01:10:01,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-26 01:10:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 01:10:01,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:01,077 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:01,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:01,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:01,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 148941760, now seen corresponding path program 1 times [2022-11-26 01:10:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:01,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107098006] [2022-11-26 01:10:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:01,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334695237] [2022-11-26 01:10:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:01,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:01,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:01,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:10:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:10:01,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:10:01,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:01,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:01,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107098006] [2022-11-26 01:10:01,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:01,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334695237] [2022-11-26 01:10:01,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334695237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:01,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:10:01,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358685841] [2022-11-26 01:10:01,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:10:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:01,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:10:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:10:01,551 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:01,649 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-11-26 01:10:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:10:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-26 01:10:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:01,651 INFO L225 Difference]: With dead ends: 51 [2022-11-26 01:10:01,651 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 01:10:01,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:10:01,652 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:01,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 131 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:10:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 01:10:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-26 01:10:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 34 states have internal predecessors, (44), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:10:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-11-26 01:10:01,664 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 20 [2022-11-26 01:10:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:01,664 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-11-26 01:10:01,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:10:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-11-26 01:10:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 01:10:01,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:01,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:01,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:01,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:01,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1894324762, now seen corresponding path program 1 times [2022-11-26 01:10:01,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:01,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940748880] [2022-11-26 01:10:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:01,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:01,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:01,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911886141] [2022-11-26 01:10:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:01,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:01,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:01,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:01,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:10:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:10:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:10:01,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:10:02,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940748880] [2022-11-26 01:10:02,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911886141] [2022-11-26 01:10:02,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911886141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640678140] [2022-11-26 01:10:02,088 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 01:10:02,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:02,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:02,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:02,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:03,118 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:10:03,178 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:06,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [640678140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:06,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:10:06,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [5, 6] total 21 [2022-11-26 01:10:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378029125] [2022-11-26 01:10:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 01:10:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 01:10:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:10:06,045 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:10:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:06,679 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2022-11-26 01:10:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 01:10:06,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-26 01:10:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:06,683 INFO L225 Difference]: With dead ends: 80 [2022-11-26 01:10:06,683 INFO L226 Difference]: Without dead ends: 58 [2022-11-26 01:10:06,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:10:06,684 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:06,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 158 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:10:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-26 01:10:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-11-26 01:10:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:10:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2022-11-26 01:10:06,716 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 21 [2022-11-26 01:10:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:06,718 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2022-11-26 01:10:06,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:10:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2022-11-26 01:10:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 01:10:06,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:06,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:06,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 01:10:06,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 01:10:06,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1377591568, now seen corresponding path program 1 times [2022-11-26 01:10:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:06,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123897332] [2022-11-26 01:10:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:06,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:06,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:06,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086483815] [2022-11-26 01:10:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:06,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:06,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:06,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:06,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:10:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 01:10:07,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:10:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:07,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123897332] [2022-11-26 01:10:07,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086483815] [2022-11-26 01:10:07,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086483815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815995224] [2022-11-26 01:10:08,000 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 01:10:08,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:08,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:08,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:08,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:08,313 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 01:10:08,323 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:10:08,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:10,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1815995224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:10,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:10,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [13] total 29 [2022-11-26 01:10:10,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189121378] [2022-11-26 01:10:10,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 01:10:10,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 01:10:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:10:10,836 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:10:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:11,314 INFO L93 Difference]: Finished difference Result 110 states and 150 transitions. [2022-11-26 01:10:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 01:10:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2022-11-26 01:10:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:11,316 INFO L225 Difference]: With dead ends: 110 [2022-11-26 01:10:11,316 INFO L226 Difference]: Without dead ends: 73 [2022-11-26 01:10:11,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:10:11,317 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:11,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:10:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-26 01:10:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-11-26 01:10:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 51 states have internal predecessors, (62), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 01:10:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2022-11-26 01:10:11,335 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 25 [2022-11-26 01:10:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:11,335 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2022-11-26 01:10:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:10:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2022-11-26 01:10:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 01:10:11,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:11,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:11,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:11,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:10:11,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1856138177, now seen corresponding path program 1 times [2022-11-26 01:10:11,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:11,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788755784] [2022-11-26 01:10:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:11,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:11,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641660191] [2022-11-26 01:10:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:11,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:11,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:11,582 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:11,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:10:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 01:10:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:10:11,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:10:11,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788755784] [2022-11-26 01:10:11,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641660191] [2022-11-26 01:10:11,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641660191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387623603] [2022-11-26 01:10:11,983 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 01:10:11,983 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:11,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:11,983 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:11,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:12,760 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2022-11-26 01:10:12,780 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:10:12,813 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [387623603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:17,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:10:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [9, 6] total 30 [2022-11-26 01:10:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955583191] [2022-11-26 01:10:17,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:17,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 01:10:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 01:10:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-11-26 01:10:17,344 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:10:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:18,311 INFO L93 Difference]: Finished difference Result 106 states and 143 transitions. [2022-11-26 01:10:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 01:10:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-26 01:10:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:18,316 INFO L225 Difference]: With dead ends: 106 [2022-11-26 01:10:18,318 INFO L226 Difference]: Without dead ends: 84 [2022-11-26 01:10:18,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:10:18,321 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:18,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 136 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:10:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-26 01:10:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-11-26 01:10:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 57 states have internal predecessors, (67), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 01:10:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2022-11-26 01:10:18,357 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 27 [2022-11-26 01:10:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:18,358 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2022-11-26 01:10:18,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:10:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2022-11-26 01:10:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 01:10:18,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:18,360 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:18,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:18,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -301475410, now seen corresponding path program 1 times [2022-11-26 01:10:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032705438] [2022-11-26 01:10:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:18,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:18,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876149603] [2022-11-26 01:10:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:18,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:18,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:18,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:10:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:10:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:10:18,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:10:18,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032705438] [2022-11-26 01:10:18,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876149603] [2022-11-26 01:10:18,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876149603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948058088] [2022-11-26 01:10:18,849 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 01:10:18,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:18,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:18,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:18,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:26,479 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 01:10:26,488 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:10:26,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:31,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [948058088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:31,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:10:31,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 7] total 26 [2022-11-26 01:10:31,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810044081] [2022-11-26 01:10:31,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:31,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 01:10:31,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 01:10:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-11-26 01:10:31,488 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 19 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 01:10:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:32,301 INFO L93 Difference]: Finished difference Result 138 states and 185 transitions. [2022-11-26 01:10:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 01:10:32,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-11-26 01:10:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:32,304 INFO L225 Difference]: With dead ends: 138 [2022-11-26 01:10:32,305 INFO L226 Difference]: Without dead ends: 101 [2022-11-26 01:10:32,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-26 01:10:32,306 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:32,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 145 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:10:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-26 01:10:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2022-11-26 01:10:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 61 states have internal predecessors, (74), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 01:10:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2022-11-26 01:10:32,330 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 47 [2022-11-26 01:10:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:32,330 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2022-11-26 01:10:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 01:10:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2022-11-26 01:10:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 01:10:32,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:32,340 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:32,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:32,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:32,545 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash 170701079, now seen corresponding path program 1 times [2022-11-26 01:10:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:32,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638335524] [2022-11-26 01:10:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:32,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:32,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625910321] [2022-11-26 01:10:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:32,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:32,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:32,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:32,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:10:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:10:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:10:32,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:10:32,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638335524] [2022-11-26 01:10:32,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625910321] [2022-11-26 01:10:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625910321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [335471395] [2022-11-26 01:10:32,772 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:10:32,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:32,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:32,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:32,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:38,559 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-26 01:10:38,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:10:38,633 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:41,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2970#(and (<= ~counter~0 6) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2022-11-26 01:10:41,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:10:41,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:10:41,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-26 01:10:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288920601] [2022-11-26 01:10:41,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:10:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:10:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:10:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:10:41,773 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:10:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:41,970 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2022-11-26 01:10:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:10:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-11-26 01:10:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:41,972 INFO L225 Difference]: With dead ends: 105 [2022-11-26 01:10:41,973 INFO L226 Difference]: Without dead ends: 103 [2022-11-26 01:10:41,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:10:41,974 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:41,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 159 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:10:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-26 01:10:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-11-26 01:10:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 74 states have internal predecessors, (89), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-26 01:10:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2022-11-26 01:10:42,005 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 48 [2022-11-26 01:10:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:42,006 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2022-11-26 01:10:42,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:10:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2022-11-26 01:10:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 01:10:42,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:42,008 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:42,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:42,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:10:42,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:42,216 INFO L85 PathProgramCache]: Analyzing trace with hash -339484245, now seen corresponding path program 1 times [2022-11-26 01:10:42,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:42,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106907439] [2022-11-26 01:10:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:42,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:42,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:10:42,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081750586] [2022-11-26 01:10:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:42,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:42,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:42,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:10:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:10:42,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:10:42,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:10:42,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:42,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106907439] [2022-11-26 01:10:42,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:10:42,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081750586] [2022-11-26 01:10:42,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081750586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:42,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514167515] [2022-11-26 01:10:42,474 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 01:10:42,474 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:42,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:42,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:42,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:46,728 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 16 iterations. Over-approximation may be very coarse. [2022-11-26 01:10:50,946 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2022-11-26 01:10:51,028 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:10:51,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:08,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3578#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= ~counter~0 7) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 3 ~counter~0))' at error location [2022-11-26 01:11:08,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:11:08,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:11:08,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-11-26 01:11:08,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506630484] [2022-11-26 01:11:08,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:11:08,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:11:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:11:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:11:08,415 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:11:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:08,543 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2022-11-26 01:11:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:11:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 48 [2022-11-26 01:11:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:08,546 INFO L225 Difference]: With dead ends: 170 [2022-11-26 01:11:08,546 INFO L226 Difference]: Without dead ends: 163 [2022-11-26 01:11:08,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:11:08,547 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:08,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 158 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:11:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-26 01:11:08,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2022-11-26 01:11:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 105 states have internal predecessors, (123), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-26 01:11:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2022-11-26 01:11:08,589 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 48 [2022-11-26 01:11:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:08,590 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2022-11-26 01:11:08,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:11:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2022-11-26 01:11:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 01:11:08,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:08,592 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:08,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:11:08,797 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1953712133, now seen corresponding path program 1 times [2022-11-26 01:11:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693983831] [2022-11-26 01:11:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:08,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:08,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:11:08,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9937110] [2022-11-26 01:11:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:08,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:08,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:08,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:08,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:11:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-26 01:11:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:11:09,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 01:11:10,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693983831] [2022-11-26 01:11:10,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:11:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9937110] [2022-11-26 01:11:10,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9937110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:11:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327253010] [2022-11-26 01:11:10,741 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 01:11:10,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:10,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:10,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:10,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:14,836 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 16 iterations. Over-approximation may be very coarse. [2022-11-26 01:11:18,026 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:11:18,030 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:11:18,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:39,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4364#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:11:39,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:11:39,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:11:39,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2022-11-26 01:11:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485809788] [2022-11-26 01:11:39,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:11:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:11:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:11:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2014, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 01:11:39,215 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 01:11:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:54,562 INFO L93 Difference]: Finished difference Result 365 states and 509 transitions. [2022-11-26 01:11:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 01:11:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2022-11-26 01:11:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:54,566 INFO L225 Difference]: With dead ends: 365 [2022-11-26 01:11:54,566 INFO L226 Difference]: Without dead ends: 291 [2022-11-26 01:11:54,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=670, Invalid=5030, Unknown=0, NotChecked=0, Total=5700 [2022-11-26 01:11:54,569 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 332 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:54,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 425 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-26 01:11:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-26 01:11:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 222. [2022-11-26 01:11:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 160 states have (on average 1.30625) internal successors, (209), 166 states have internal predecessors, (209), 47 states have call successors, (47), 14 states have call predecessors, (47), 14 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-26 01:11:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 302 transitions. [2022-11-26 01:11:54,646 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 302 transitions. Word has length 49 [2022-11-26 01:11:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:54,646 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 302 transitions. [2022-11-26 01:11:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 01:11:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 302 transitions. [2022-11-26 01:11:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 01:11:54,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:54,648 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:54,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:54,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:54,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:54,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1444675635, now seen corresponding path program 1 times [2022-11-26 01:11:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:54,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213387285] [2022-11-26 01:11:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:54,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:54,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:11:54,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618230996] [2022-11-26 01:11:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:54,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:54,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:54,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:54,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:11:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:11:54,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:11:55,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:11:55,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213387285] [2022-11-26 01:11:55,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:11:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618230996] [2022-11-26 01:11:55,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618230996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:11:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [738541143] [2022-11-26 01:11:55,088 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 01:11:55,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:55,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:55,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:55,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:17,837 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-26 01:12:17,841 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:12:17,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:21,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5587#(and (<= ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2022-11-26 01:12:21,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:21,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:12:21,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-11-26 01:12:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757047299] [2022-11-26 01:12:21,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:21,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:12:21,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:12:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:12:21,930 INFO L87 Difference]: Start difference. First operand 222 states and 302 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-26 01:12:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:22,102 INFO L93 Difference]: Finished difference Result 314 states and 430 transitions. [2022-11-26 01:12:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:12:22,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 49 [2022-11-26 01:12:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:22,104 INFO L225 Difference]: With dead ends: 314 [2022-11-26 01:12:22,104 INFO L226 Difference]: Without dead ends: 231 [2022-11-26 01:12:22,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 01:12:22,106 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:22,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:12:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-26 01:12:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2022-11-26 01:12:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 163 states have (on average 1.3006134969325154) internal successors, (212), 168 states have internal predecessors, (212), 47 states have call successors, (47), 14 states have call predecessors, (47), 14 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-26 01:12:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 305 transitions. [2022-11-26 01:12:22,168 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 305 transitions. Word has length 49 [2022-11-26 01:12:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:22,169 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 305 transitions. [2022-11-26 01:12:22,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-26 01:12:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 305 transitions. [2022-11-26 01:12:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 01:12:22,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:22,170 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:22,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:22,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:22,374 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:22,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash -324758054, now seen corresponding path program 1 times [2022-11-26 01:12:22,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:22,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535862910] [2022-11-26 01:12:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:22,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:12:22,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030370063] [2022-11-26 01:12:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:22,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:22,385 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:22,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:12:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:22,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:12:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:12:22,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:12:22,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535862910] [2022-11-26 01:12:22,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:12:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030370063] [2022-11-26 01:12:22,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030370063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559366805] [2022-11-26 01:12:22,612 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 01:12:22,612 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:22,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:22,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:22,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:26,674 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-26 01:12:26,678 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-26 01:12:26,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:31,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6686#(and (<= ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2022-11-26 01:12:31,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:31,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:12:31,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-11-26 01:12:31,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16936433] [2022-11-26 01:12:31,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:31,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:12:31,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:31,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:12:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:12:31,851 INFO L87 Difference]: Start difference. First operand 225 states and 305 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:12:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:32,018 INFO L93 Difference]: Finished difference Result 309 states and 412 transitions. [2022-11-26 01:12:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:12:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 50 [2022-11-26 01:12:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:32,022 INFO L225 Difference]: With dead ends: 309 [2022-11-26 01:12:32,022 INFO L226 Difference]: Without dead ends: 174 [2022-11-26 01:12:32,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:12:32,024 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 61 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:32,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 171 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:12:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-26 01:12:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2022-11-26 01:12:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 97 states have internal predecessors, (110), 19 states have call successors, (19), 13 states have call predecessors, (19), 13 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 01:12:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2022-11-26 01:12:32,054 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 50 [2022-11-26 01:12:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:32,054 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2022-11-26 01:12:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:12:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2022-11-26 01:12:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 01:12:32,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:32,056 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:32,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-26 01:12:32,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:12:32,256 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -563308081, now seen corresponding path program 1 times [2022-11-26 01:12:32,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:32,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886394596] [2022-11-26 01:12:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:32,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:32,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:12:32,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815216067] [2022-11-26 01:12:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:32,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:32,275 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:32,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:12:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:12:32,346 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 01:12:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:12:32,400 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 01:12:32,401 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 01:12:32,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 01:12:32,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-26 01:12:32,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:32,612 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:32,615 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:12:32,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:12:32 BoogieIcfgContainer [2022-11-26 01:12:32,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:12:32,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:12:32,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:12:32,655 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:12:32,656 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:58" (3/4) ... [2022-11-26 01:12:32,658 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 01:12:32,721 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 01:12:32,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:12:32,722 INFO L158 Benchmark]: Toolchain (without parser) took 154440.14ms. Allocated memory was 182.5MB in the beginning and 664.8MB in the end (delta: 482.3MB). Free memory was 150.6MB in the beginning and 343.4MB in the end (delta: -192.8MB). Peak memory consumption was 291.5MB. Max. memory is 16.1GB. [2022-11-26 01:12:32,723 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory was 96.4MB in the beginning and 96.3MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:12:32,723 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.13ms. Allocated memory is still 182.5MB. Free memory was 150.6MB in the beginning and 139.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 01:12:32,723 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.92ms. Allocated memory is still 182.5MB. Free memory was 139.1MB in the beginning and 138.3MB in the end (delta: 851.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:12:32,724 INFO L158 Benchmark]: Boogie Preprocessor took 21.42ms. Allocated memory is still 182.5MB. Free memory was 137.9MB in the beginning and 137.0MB in the end (delta: 869.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:12:32,724 INFO L158 Benchmark]: RCFGBuilder took 370.53ms. Allocated memory is still 182.5MB. Free memory was 136.2MB in the beginning and 123.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 01:12:32,724 INFO L158 Benchmark]: TraceAbstraction took 153702.04ms. Allocated memory was 182.5MB in the beginning and 664.8MB in the end (delta: 482.3MB). Free memory was 122.4MB in the beginning and 346.6MB in the end (delta: -224.2MB). Peak memory consumption was 260.0MB. Max. memory is 16.1GB. [2022-11-26 01:12:32,725 INFO L158 Benchmark]: Witness Printer took 66.68ms. Allocated memory is still 664.8MB. Free memory was 346.6MB in the beginning and 343.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:12:32,726 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory was 96.4MB in the beginning and 96.3MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.13ms. Allocated memory is still 182.5MB. Free memory was 150.6MB in the beginning and 139.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.92ms. Allocated memory is still 182.5MB. Free memory was 139.1MB in the beginning and 138.3MB in the end (delta: 851.1kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.42ms. Allocated memory is still 182.5MB. Free memory was 137.9MB in the beginning and 137.0MB in the end (delta: 869.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 370.53ms. Allocated memory is still 182.5MB. Free memory was 136.2MB in the beginning and 123.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 153702.04ms. Allocated memory was 182.5MB in the beginning and 664.8MB in the end (delta: 482.3MB). Free memory was 122.4MB in the beginning and 346.6MB in the end (delta: -224.2MB). Peak memory consumption was 260.0MB. Max. memory is 16.1GB. * Witness Printer took 66.68ms. Allocated memory is still 664.8MB. Free memory was 346.6MB in the beginning and 343.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 153.5s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 19.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 605 SdHoareTripleChecker+Valid, 9.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 580 mSDsluCounter, 2113 SdHoareTripleChecker+Invalid, 8.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1651 mSDsCounter, 337 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3120 IncrementalHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 337 mSolverCounterUnsat, 462 mSDtfsCounter, 3120 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1174 GetRequests, 812 SyntacticMatches, 40 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 76.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=225occurred in iteration=13, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 179 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 763 ConstructedInterpolants, 1 QuantifiedInterpolants, 3747 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1702 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 467/552 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 9.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 11, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 116, DAG_INTERPRETER_EARLY_EXITS: 6, TOOLS_POST_APPLICATIONS: 134, TOOLS_POST_TIME: 2.0s, TOOLS_POST_CALL_APPLICATIONS: 73, TOOLS_POST_CALL_TIME: 5.5s, TOOLS_POST_RETURN_APPLICATIONS: 58, TOOLS_POST_RETURN_TIME: 0.9s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 262, TOOLS_QUANTIFIERELIM_TIME: 8.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 328, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 80, DOMAIN_JOIN_TIME: 1.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 9, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 116, DOMAIN_ISBOTTOM_TIME: 0.2s, LOOP_SUMMARIZER_APPLICATIONS: 5, LOOP_SUMMARIZER_CACHE_MISSES: 5, LOOP_SUMMARIZER_OVERALL_TIME: 5.8s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 5.8s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 9, CALL_SUMMARIZER_APPLICATIONS: 58, CALL_SUMMARIZER_CACHE_MISSES: 6, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1229, DAG_COMPRESSION_RETAINED_NODES: 283, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 01:12:32,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd74b3d-ee37-4914-8ee4-6d0ccce8f0f8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE